Question1: At an OLA site, the maximum output optical power of the OAU is 20 dBm. It is used in an 80-wavelength C-band system. 10 waves are actually enabled. There is no spectrum analysis board, and the combined signal needs to be used for commissioning. How much dBm should be adjusted for the output optical power of the OUT port?
Question2: TEM28 is an Ethernet aggregation tributary board. Which of the following descriptions about the TEM28 single board are correct? (Multiple choice)
Question3: Which of the following descriptions about MPLS and PWE3 are correct? (Multiple choice)
Question4: The strength of the nonlinear effect of optical fiber is related to the optical power entering the fiber, the spectral width of the optical signal, and the characteristics of the modulation code pattern, and has nothing to do with the dispersion coefficient of the optical fiber and the number of spans.
Question5: Which of the following factors are considered that ASON supports routing strategies based on? (Multiple choice)
Question6: In the electrical layer application scenario of end-to-end tributary board interconnection, what are the interconnection requirements for tributary boards? (Multiple choice)
Question7: SES: 5% or more errored blocks or at least one defect in one second (OCI/AIS/LCKYAE/LTC/TIM/PLM).
Question8: What is the connection port between BTS and transmission in the high-speed rail base station?
Question9: Which of the following elements does a data communication network have in terms of equipment? (Multiple choice)
Question10: Which of the following is the adjustment unit of AU-PTR?
Question11: MPLS-TP is a subset of MPLS, which removes the connectionless IP-based forwarding and adds the end-to-end OAM function.
Question12: In the troubleshooting scenario, which of the following descriptions about the channels for obtaining signal flow information is wrong?
Question13: The rigid pipes that MS-OTN equipment can provide include? (Multiple choice)
Question14: When using the dual slot line group MSP ring, which of the following situations is the multiplex section overhead K bytes in the pass-through state?
Question15: What are the following steps for low-speed services to be multiplexed into high-speed SDH services? (Multiple choice)
Question16: Coherent reception uses a local oscillator laser of the same frequency to perform coherence with the received optical signal, and which of the following information is recovered from the received signal? (Multiple choice)
Question17: Which of the following descriptions about equipment heat dissipation is correct? (Multiple choice)
Question18: For an amplifier, the smaller its noise figure (NF) value, the less noise it introduces, and the longer distance it can transmit under the same conditions.
Question19: Which of the following fault handling methods that can be used to isolate external faults? (Multiple choice)
Question20: The standard Ethernet frame length should not be less than 64 bytes.
Which of the following factors cause this limitation? (Multiple choice)
Question21: Optical fiber and LEAP optical fiber systems, 1006 and 106 mixed transmissions need to set up isolation bands, and only one-sided adjacency is supported, and double-sided adjacency is prohibited. 100G is preferentially configured with long wavelengths, and 10G is configured with short wavelengths.
Question22: Which one of the following networking forms that support additional service configurations.
Question23: Which of the following descriptions about the TNF6TTA board is correct? (Multiple choice)
Question24: When light passes through a passive optical device, it will cause a drop in optical power. This loss is called the insertion loss of the device.
Question25: The main difference between an open DWDM system and an integrated DWDM system is whether one of the following technologies is used?
Question26: Which of the following options matches the meaning expressed by "the liquid length carrying the local service can be transmitted to any direction"?
Question27: The frame alignment signal is used for signal frame alignment. When the system detects FAS abnormality, it reports () or 0Uk 10FLo alarm.
Question28: When multiple alarms are reported, the priority principle of alarm processing is as follows: according to the priority of equipment type alarms (BUS_ERR, HARD_ERR, COMM FAIL, etc.), optical layer LOS, electrical layer OTUk LOF, ODUK_SSF, and protection type protection switching Handle and troubleshoot alarms.
Question29: Which of the following statements about the alarm reversal function is wrong?
Question30: In daily maintenance scenarios, reset is one of the common operations. Which of the following descriptions about resetting a board is wrong?
Question31: Which of the following options are included in the half-yearly maintenance project on the network management side? (Multiple choice)
Question32: Which of the following belongs to the optical layer part of the OTN frame structure? (Multiple choice)
Question33: Which of the following descriptions about circuit boards is wrong? (Multiple choice)
Question34: After the U2000 delivers configuration data to the NE, if the verification of the SCC board fails, the NE enters the installation state.
Question35: Which of the following descriptions about the EX40 board is wrong?
Question36: Which of the following descriptions of the ASDN software structure are correct? (Multiple choice)
Question37: The inter-board crossover refers to the cross-connection configured between different single boards. Which inter-board crossover between boards can be realized on the network management? (Multiple choice)
Question38: Mandatory switching. Fiber switching manual switching and motion switching are in descending order of priority.
Question39: The U2000 network management system supports multiple external interfaces. Which of the following interfaces can be used when interconnecting with other manufacturers' equipment? (Multiple choice)
Question40: The TNG1M404DM single board is a wavelength conversion board that can multiplex 4 channels of 40 Gbit/s services to 2 channels of 200G signals.
Question41: What principle of light is used for the propagation of light in optical fiber?
Question42: Which of the following is not an advantage of using QinQ technology?
Question43: The smaller the grounding resistance value of the equipment, the better. The smaller the value, the faster the current will be introduced into the ground.
Question44: Which of the following optical loss alarms will not cause service interruption? (Multiple choice)
Question45: Which of the following descriptions about ROADM is correct? (Multiple choice)
Question46: NG WDM devices only support the global label space, and the size of the label space is 32768
Question47: Bit errors may occur if the received optical power is close to the sensitivity, and bit errors may also occur if the received optical power is close to the overload point.
Question48: Which of the following time periods is the information of the 2M signal loaded into the multiframe?
Question49: The characteristic test of NS4 single board includes? (Multiple choice)
Question50: Which of the following descriptions about commissioning of super-100G and 100G hybrid transmission systems is wrong?
Question51: OLA sites can also use ESC.
Question52: Which of the following description of replacing the main control board is wrong?
Question53: Which of the following is the maximum number of OSN3500 subracks that can be installed in a 22-meter cabinet?
Question54: Which of the following methods to avoid discrete paths is correct? (Multiple choice)
Question55: The last 256 columns of the OTN frame structure are FEC areas, whose function is forward error correction.
Question56: The basic principle of MSTP equipment fault location is? (Multiple choice)
Question57: Since the EALC/ALC function is used in the SOM system, the service may be interrupted during optical power adjustment.
Question58: Which of the following is correct about the processing of data frames by the ports of the data board? (Multiple choice)
Question59: Among the working modes provided by the line fiber quality monitoring function, which one is not included?
Question60: Which of the following statements about clock sources is wrong?
Question61: When static aggregation adds or deletes member ports, the LACP protocol must be run
Question62: If the SNCP services with the same source-sink or route are grouped, the SNCP switching speed can be improved.
Question63: Please put the correct answer into the corresponding number position in the picture.
Question64: When setting the monitoring time of network element performance events, which of the following should be set as the time?
Question65: LAG can only be configured in non-load sharing mode
Question66: The user-oriented interface and transmission network-oriented interface of the E-Line service are?
Question67: In a typical chain-type NG WDM network (such as A→B→C, A, B, and C are three stations), it is found that the service phone between station A and station C is not connected during commissioning. What are the possible reasons? (Multiple choice)
Question68: Which of the following items does the basic structure of a WDM system include? (Multiple choice)
Question69: When performing fiber synchronization, the network element does not create a fiber representation?
Question70: While amplifying business signals, EDFA will also bring noise to the system, which is the main source of noise.
Question71: Which of the following statements about basic LCAS functions are true? (Multiple choice)
Question72: When a signal with a standard Ethernet frame length of 64Bytes is connected to the Ethernet board, if the QinQ function is enabled, what is the actual frame length of the signal inside the board () Bytes?
Question73: Which of the following descriptions about business boundary labels is wrong?
Question74: OOS overhead is non-associated overhead. Which of the following descriptions about OOS overhead is wrong?
Question75: What parameter does the ECC protocol use as the unique identifier of the network element, and NCE also uses it as the keyword for retrieval when identifying different network elements in the interface and database?
Question76: The () function of the 0A module of the EMR8 single board makes the system increase or decrease one or several channels or when the optical signal of some channels fluctuates, without affecting the signal gain of other channels.
Question77: In the G.652 and LEAF optical fiber system, isolation bands need to be set when super 100G and 10G are mixed.
Question78: In which ITU-T recommendation is the OTN frame structure defined?
Question79: In the troubleshooting scenario, in order to detect and locate abnormal optical power faults in a timely manner, which of the following descriptions about the matters that need attention in daily maintenance is correct? (Multiple choice)
Question80: Which of the following description about 1+1 optical line protection is wrong?
Question81: The LER in the MPLS network is a kind of LSR located at the edge of the network.
Question82: In the extended SSM ring network dual BITS clock protection scenario, in order to prevent the clock signal from forming a loop, you only need to configure the external clock source and internal clock source ID of the network element connected to the active BITS, and the network element connected to the backup BITS does not need to be configured. Internal clock ID.
Question83: Which of the following overheads is not ODUk overhead?
Question84: Which of the following descriptions about TunnelAPS protection is wrong?
Question85: There is a slot mapping relationship between the OSN3500 processing board and the interface board. The processing board in slot 1 maps to the interface boards in slots 19-20.
Question86: For hybrid transmission systems, the principle of coherent commissioning should be followed first.
Question87: Physical port: also known as MAC port. It is the external port of the single board.
Question88: Which of the following is the main advantage of SDH? (Multiple choice)
Question89: Which port of the M40 is the output of the 3THz wavelength OTU single board connected to?
Question90: How many VC12 virtual TE links are supported by the same physical board or between two adjacent network elements?
Question91: WDM system fault location follows the principle of first locating the outside, then the inside; first locating the network, then locating the network element; first (), then unidirectional;
Question92: The manual reset at the equipment site is hard reset.
Question93: On the network management system, the network element performance monitoring time is set to () minutes and () hours.
Question94: Which of the following alarm/event dump modes does U2000 support? (Multiple choice)
Question95: The NHLFE next-hop label forwarding entry contains the next-hop address and ().
Question96: Which of the following descriptions about oTN optical layer interfaces OTM-nm and OTM-nr.m is wrong?
Question97: When creating a single-site optical crossover, an error message "The direction of the fiber cable is selected wrongly" appears. The possible reason is?
Question98: The network element defaults to automatic expansion of ECC communication. When the number of Huawei equipment NEs using extended ECC communication is greater than how much specified value? it is recommended to use manual extended ECC communication
Question99: Which of the following is the difference between AU pointer and TU pointer? (Multiple choice)
Question100: Which of the following descriptions about the technical characteristics of OTN is correct? (Multiple choice)
Question101: When the main control board is single-configured, which step is required to replace the single board compared to when the main control board is dual-configured?
Question102: Which of the following reasons may cause bit errors in the business? (Multiple choice)
Question103: FOADM includes parallel FOADM and serial FOADM, both of which support 40 full waves or 80 waves of any wavelength.
Question104: When adjusting the optical power, the flatness is a very important index. The adjustment of the flatness is generally completed through the single-channel VOA in the multiplexer board. For example, when the flatness is adjusted through the M4OV, the M40V board can detect For the input optical power of all multiplexing ports, the project can set different VOAs according to different input power values to achieve the purpose of flatness commissioning.
Question105: OCI stands for Open Connection Indication. The signal sent downstream indicates that the upstream management command in the connection function has opened the matrix connection, and the signal loss state detected at the terminal point may be related to the opened matrix.
Question106: For Huawei equipment, the NODE ID is the unique identifier of the intelligent network element on the control plane. After the network is configured with intelligent services, the NODE ID will not be modified during construction.
Question107: WDM is a technology that simultaneously transmits () optical signals on the same optical fiber.
Question108: Which of the following description of the contents of the calculation formula of the maximum line rate frame rate (N=Ratc/((L+7+1+M)x8)) is wrong?
Question109: The special fiber input power (high power) is higher than the main fiber input power. The main purpose is to improve what factor?
Question110: When performing fiber synchronization, the network element does not create a fiber, indicating that the fiber connection only exists on the local network management side.
Question111: The receiving sensitivity of a certain optical monitoring board is -48dBm. When the input optical power is -5dBm, it meets the requirements of the optical power receiving range.
Question112: What are the causes of discrete services? (Multiple choice)
Question113: Both the SC2 and ST2 boards support the processing and transparent transmission of 1588V2 signals.
Question114: The clock ID can solve the possible timing loop problem. In the following networking, in order to completely solve the clock loop, how many clock IDs need to be set in total?
Question115: ESC is mainly divided into which of the following from the principle of realization? (Multiple choice)
Question116: Both OTUCn and ODUCn can complete the functions of digital field and channel layer.
Question117: Which of the following descriptions about the delay of store-and-forward devices is wrong?
Question118: In MRPS protection, when a fault occurs, the Raw label is swapped into a Rap label and switched to the protection channel.
Question119: The SDH network will not change the structure and rate of the client-side signal.
Question120: Which of the following descriptions about commissioning of non-coherent and coherent hybrid transmission systems is wrong?
Question121: What are the functions completed by the SDH overhead bytes? (Multiple choice)
Question122: The subnet mask of 255.255.255.248 is calculated according to the calculation formula. It can accommodate 23 devices, that is, 8 devices.
Question123: APAUSE frames using reserved multicast addresses are not forwarded by bridges or switches. This way the PAUSE frame does not generate any other information.
Question124: Which of the following alarms can trigger the 1+1 protection on the client side? (Multiple choice)
Question125: OSN 7500 supports a maximum of 2M service boards. Which of the following is correct?
Question126: The instrument test method is generally used to eliminate external problems of transmission equipment and docking problems with other equipment.
Question127: Which of the following descriptions about ODUflex are correct? (Multiple choice)
Question128: When the cross-connect board is configured with 1+1 hot backup, under normal switching conditions, the replacement of the cross-connect clock board will not affect the packet service.
Question129: Which of the following clock operating modes supports the ITU-TG781 standard? (Multiple choice)
Question130: MC_ LAG can only be configured in non-load sharing mode.
Question131: The lower the noise figure creep value of the amplifier, the less noise the amplifier introduces.
Question132: After the GE service enters the client side of the Ethernet OTU board, it is encapsulated into an OTN signal or an SDH signal by the signal processing module. The alarm signal processing for the OTN signal and the SDH signal is the same.
Question133: When inserting LCK to the ODUk signal at the local end, what processing will the downstream station system perform? (Multiple choice)
Question134: Which of the following descriptions about the PANEL panel on OptiXtrans DC908 is wrong?
Question135: For the hybrid transmission system with dispersion compensation, the requirements for the optical power entering the fiber should be consistent with the requirements of the original non-coherent system.
Question136: Which of the following ROADW boards contains the core component WSS?
Question137: When the OSN 8800 T32 cabinet emits an alarm beep, which of the following methods can be used to turn off the alarm beep?
Question138: The frame frequency () of different levels of STM level, the transmission rate is different
Question139: In the WDM system, troubleshooting generally follows the principles of external first and then internal, first network and then network element, first () and then one-way, first advanced and then (), and first multi-wave and then single-wave.
Question140: The main optical path monitoring is based on the OMS segment, which mainly monitors the following items: (Multiple choice)
Question141: The only functional difference between OPSA and OPSB is that OPSA has ( ) after the splitter, while OPSB does not.
Question142: The last 256 columns in the OTN frame structure are the FEC area for forward error correction.
Question143: () and () are two important performance indicators of the SDH transmission system.
Question144: The pointer is used for alignment. Indicates the starting position of the VC in the corresponding AU or TU. In this way: the corresponding VC can be correctly removed from the STMN, and then the VC and C packages are divided into separate low-rate signals, such as PDH: That is to say, the low-rate tributary signal can be discarded directly from the STMN signal.
Question145: Which of the following descriptions about optical line protection and ODUk SNCP protection is wrong?
Question146: Which of the following boards can be inserted into the OSN 9800 U64 subrack?
Question147: Which of the following are the main reasons why OSC monitoring signals are not amplified by EDFA along with business signals?
Question148: When the value of the S1 byte is Ox02, it means ().
Question149: Establish an Ethernet private line service between H (HQ) and H2 (branch) of the enterprise and bind 5 VC-12s in the corresponding VCTRUNK. When a C-12 fails, the Ethernet between H and H2, the leased line will not be interrupted so which of the following statements is true?
Question150: In the Colorless scenario, use the M40V/D40 board for adding and adding waves.
Question151: The two PIU/APIU boards of the OSN 1800 equipment use hot backup to supply power to the system. When one PIU/APIU board fails, the system can still work normally.
Question152: In coherent systems and non-standard fiber entry scenarios, the reference point of fiber entry optical power is moved from the output port of the optical amplifier board at the sending end to the output port of the FIU.
Question153: For the SSM protocol, which of the following statements are correct? (Multiple choice)
Question154: The network must have protection capabilities. Which one is the first condition that needs to be met?
Question155: Which of the following descriptions about the TMB1AST2 board is wrong?
Question156: OSN 3500 branch service has strong up and down capabilities: there are 16 branch outlet slots, 504 2M, 32 E4, 117 E3/DS3, and 132 STW-1e to provide STM-1/4/16/ 64 group rate
Question157: MPLS label consists of which of the following parts? (Multiple choice)
Question158: Once a nonlinear effect occurs, its impact on service signals cannot be repaired. Therefore, the current network's approach to dealing with nonlinear effects is to avoid the occurrence of nonlinear effects as much as possible.
Question159: Which of the following descriptions about the function of the electrical layer overhead processing source are correct? (Multiple choice)
Question160: The input optical power of an OAU101 board in a network is -19dBm, and the output power needs to reach 1dBm. Due to the long distance, a DCM (D) module is connected between the TDC and RDC of the board, and the attenuation is 5.5 dB, then in order to meet the requirements, the gain of the board should be set on the network management?
Question161: For OSN series equipment, what alarm will be reported when one of the PIUs is not connected to the power supply?
Question162: For a point-to-point network, set the TIM mode on the network management system to path terminal sink "only compare DAPI".
Question163: In the troubleshooting scenario, maintenance personnel need to master the basic operations of commonly used instruments. Which of the following descriptions about commonly used instruments is correct?
Question164: Which of the following residual dispersion values are within the dispersion tolerance of the TN52ND2 board? (Multiple choice)
Question165: In order to meet the specified synchronization quality requirements, corresponding requirements must be made on the network for synchronous transmission, and the specified networking rules must be followed during network planning. Which of the following is wrong?
Question166: Which of the following descriptions about the AU pointer are correct? (Multiple choice)
Question167: MSTP adds () and () interfaces and corresponding signal processing capabilities on top of the original SDH.
Question168: Which of the following descriptions about the MPLS architecture is correct? (Multiple choice)
Question169: Which of the following services has the smallest frame period?
Question170: In the 80-wave 6.653 system, if the system capacity requirement is not high, use () to increase the transmission distance, you can use the 40-wave hollow specification, available () (Multiple choice)
Question171: Compared with the SDH system, the WDM system improves the utilization of optical fibers by dividing optical fibers into "multi-lanes"
Question172: According to the G.709 protocol, how many ODU2e signals can one ODU3 signal multiplex at most?
Question173: For nonlinear effect FWM, which of the following processing methods is correct?
Question174: The super 100G OTN signal contains various electrical layer overheads. Which of the following options belong to its electrical layer overhead? (Multiple choice)
Question175: () multiplex ODU2e to one ODU3, () multiplex ODU2 to one ODU3.
Question176: Among the following boards, whether the protection is configured or not, which options will interrupt the services passing through the board if the board is replaced? (Multiple choice)
Question177: Which of the following are necessary prerequisites for creating a bidirectional MPLS Tunnel? (Multiple choice)
Question178: Which of the following will cause a BEFFEC_EXC alarm to be reported on a single channel?
Question179: It is known that the difference threshold of the main channel and the standby channel is 5dB initial optical power, and both the main channel and the standby channel are 2dBm. Due to the increase of the optical fiber loss of the main channel, the optical power of the main channel becomes -4dBm. The standby channel remains unchanged. In this case, optical line protection switching will be triggered.
Question180: What are the main functions of LAG? (Multiple choice)
Question181: Which of the following descriptions about the TNG2M402D board is wrong?
Question182: Items for daily equipment maintenance, excluding:
Question183: The scope of management of OMSn is the path from the input optical port on the multiplexer unit at the sending site to the output optical port on the demultiplexer unit at the receiving site. It is called the optical multiplex section (OMS) path.
Question184: What operation does the PROG indicator of the NG WDM device board blink rapidly (green) indicate?
Question185: Which of the following is the monitoring overhead for monitoring and reporting OTUk_DEG and OTUk_EXC alarms?
Question186: Inter-board crossover mainly includes two application scenarios: client-side service drop-in and WDM-side service pass-through.
Question187: Which of the following belongs to the client-side logical port of the single board in standard mode?
Question188: 64K SNCP protection is used to protect 64K services. Which of the following configurations can support 64K SNCP protection? (Multiple choice)
Question189: Which of the following statements are true about the EFS4 circuit board? (Multiple choice)
Question190: Common fault location methods include which of the following items? (Multiple choice)
Question191: Which of the following descriptions about the signal flow at the OTM site (OSN 8800 equipment) is wrong?
Question192: Which of the following is the effect of changing the network element ID of OSN3500 on the NMS?
Question193: If the LED on the SCC board of the OSN 8800 T32 displays a value of 11, what is the subrack ID information?
Question194: OptiX NG SDH equipment supports -48V and -60V two kinds of power supply. For the N4GSCC single board, the different settings of the power jumper mean the input power is different. Which of the following description is correct? (Multiple choice)
Question195: Which of the following difference between a wide area network and a local area network is correct?
Question196: Which of the following descriptions about commissioning of fiber-in optical power is correct? (Multiple choice)
Question197: Which of the following are common networking methods in WDM networks? (Multiple choice)
Question198: There are two transmission modes in the WDM system, respectively () is and ()
Question199: It mainly completes the point-to-point voice communication between adjacent stations, without dialing, and it can be connected immediately after off-hook. This PCM service is called?
Question200: Which of the following is the maximum service capacity on the STM-4 bidirectional multiplex section protection ring composed of four network elements?
Question201: SF is a signal failure event and SD is a signal degradation event. Both SF and SD events are conditions for triggering protection switching; however, whether SD time is used as a condition for triggering switching can be set by the user.
Question202: Incoherent systems need to physically compensate DCK to solve the dispersion problem. The following descriptions about the position of DCM in the network and optical power requirements, which options are correct? (Multiple choice)
Question203: The technology of recovering amplitude, phase and polarization state information from the received signal by using which of the following characteristics of the laser to coherent with the received optical signal is called coherent receiving technology?
Question204: During the maintenance of OSN equipment, it is often seen that the fan is running at full speed and the equipment reports a TEMP_OVER alarm. The common reasons and solutions are?
Question205: PWE3 is a processing mechanism that simulates the key attributes of a certain service and transmits it end-to-end on the PSN network through a tunnel (IP/MPLS).
Question206: When using the LCAS function. Which of the following overhead bytes is used to transmit control information? (Multiple choice)
Question207: Which of the following protections in microwave equipment does not require dual slots?
Question208: Which of the following descriptions about the OTU board is correct? (Multiple choice)
Question209: The TAG attribute cannot be set for the internal port VCTRUNK of the board on the NMS.
Question210: The loss of optical fiber mainly includes which of the following options? (Multiple choice)
Question211: If the network element ID is modified, the communication between the network management system and the network element will be interrupted, which may result in the loss of the original configuration information of the network element and affect the normal operation of features such as protection.
Question212: FXS and FXO are the names of ports used by analog telephone lines. FXO and FXS are always used in pairs.
Question213: In the same ASON network, which of the following parameters can uniquely identify an intelligent network element within the scope of the intelligent domain?
Question214: The path at the GE level is essentially a path at the Client level.
Question215: Which of the following descriptions about OSNR is wrong?
Question216: In any scenario, hard reset of the main control board will cause service interruption.
Question217: NG WDM adopts L0+L1+L2 three-layer structure. Among them, the L2 layer realizes the switching based on Ethernet/MPLS-TP, the L1 layer realizes the switching based on ODUk/VC, and the L0 layer realizes the switching based on ingress
Question218: For a typical fixed WDM system, the channel spacing is N*5Oghz, for a WDM system based on the FlexGrid optical platform, the channel spacing is N*12.5Ghz.
Question219: When using the path method to create OCh, which of the following service layer paths is required?
Question220: SDH can transmit any rate signal in the SDH system after being packaged.
Question221: Which of the following functions does EX40 increase compared to X40?
Question222: Regarding the reporting of the OTUk_BDI alarm, which of the following statements is wrong?
Question223: Which of the following reports will be reported when the fiber is cut off on a common MSP ring? (Multiple choice)
Question224: What items does the network reference model of PWE3 include? (Multiple choice)
Question225: Regarding the bit error test of the entire network during commissioning, which of the following statements is correct? (Multiple choice)
Question226: Which of the following description about using the synchronous method to create fibers is wrong?
Question227: Which of the following types of E-Line services are supported by MS-OTN packet equipment? (Multiple choice)
Question228: When the PW bears Ethernet services, two layers of labels are encapsulated, the outer label is PW, and the inner label is TUNNEL.
Question229: When the LCK is inserted at the Pl overhead of the ODUk at the local end, how will the downstream station handle it? (Multiple choice)
Question230: The UITL board belongs to the optical multiplexing and demultiplexing boards. The UITL board realizes the multiplexing and demultiplexing of () GHz interval and () GHz interval signals.
Question231: Which of the following descriptions about the TMB1AST2 board is correct? (Multiple choice)
Question232: Which of the following description of discrete services are correct? (Multiple choice)
Question233: When using OSN8800 T32, if you need to set the ID numbers of the master and slave subracks, on which board should you set them?
Question234: Which of the following are not part of the ASON control protocol?
Question235: MPLS APS is a network protection mechanism, which implements service switching through the detection function of MPLS OAM.
Question236: Which of the following is not included in the basic architecture of MPLS L2VPN?
Question237: The number of E1 frames that can be encapsulated in a CESoPSN message is determined by the "package loading time".
Question238: OTU_LOM is an alarm generated due to the out-of-multiframe (OOM) state lasting for 3ms.
Question239: In actual WDM systems, systems with a rate of 10G and below are greatly affected by polarization mode dispersion.
Question240: Which of the following is the overall structure of the WDM system with N-channel wavelength multiplexing? (Multiple choice)
Question241: Regarding the system architecture of NG WDM products, which of the following descriptions are correct? (Multiple choice)
Question242: Which of the following description of equipment operation is wrong?
Question243: Which particles can the cross-connect board of the OSN 8800 device perform cross-connect scheduling? (Multiple choice)
Question244: If the cumulative amount of dispersion exceeds the system's dispersion tolerance, it will cause bit errors at the receiving end.
Question245: Which of the following alarms will be reported by the NMS when the severely errored seconds (SES) occurs in the PM part of the ODUk layer?
Question246: The NG WDM two-dimensional ROADM site can use the WSMD9 single board, and its signal flow is the optical signal connected to the main optical channel from the "IN" optical port. Through the RDU (ROADM Demix Unit) optical module broadcast into 9 channels of the same optical signal; respectively output from the "DM1~DM8" and "ECPO" optical ports. One of the signals is dropped locally by the splitter board, and the other 8 signals are dispatched to the other 8 directions. From the "EXPI" optical port to access the signals of each wave of the main optical channel. The multiplexed or single-wavelength optical signals that need to be added locally are input through the "AM1"~"AM8" optical ports.
Question247: Which of the following layer overheads belongs to the electrical layer overhead of OTN? (Multiple choice)
Question248: Regarding the following three types of ODUk SNCP protection, which of the following types cannot be configured in the scenario where the working or protection path of the service is carried by two or more channels?
Question249: Which of the following reasons will not cause the network management to report the MUT_LOS alarm?
Question250: In the OTN electrical layer structure, which one is correct about the description of the hierarchical order of the signal input from the WDM side to the output path of the client side?
Question251: The overall procedure for commissioning optical power of a system without an optical amplifier: adjust in sequence from upstream to downstream according to the flow direction of the signal, focusing on the optical power requirements of OTU boards, branch boards, line boards, and wavelength conversion boards. make adjustments
Question252: The value of the MFAS byte increases with the sequence number of the OTUk/ODUk base frame. And includes the most () base frames
Question253: Like STP equipment, NG WDM equipment can practice network element configuration on the network management system through pre-configuration.
Question254: The trigger condition for automatic protection switching of 1+1 optical line protection is SF (signal failure), and the two alarms involved are () and ()
Question255: Which of the following are the traditional methods of multiplexing low-speed signals into high-speed signals? (Multiple choice)
Question256: According to the description in the blank, select the correct on-demand OAM type:
Question257: Which of the following statements about pointer adjustment is correct? (Multiple choice)
Question258: Which of the following are the common test indicators for Ethernet services? (Multiple choice)
Question259: Which of the following is a functional unit that provides a high-speed signal interface and processes the corresponding signal?
Question260: The TOA board is an 8-way arbitrary rate service tributary processing board. Which of the following description about the TOA (STND) board is wrong?
Question261: CC is used to detect the unidirectional connectivity between any pair of MEPs in the MEG. If the own-end MEP does not receive a CCM packet within 3 times the packet sending period, it is considered that there is a problem with the connectivity between the source-end MEP and the destination-end MEP.
Question262: NG WDM system fault analysis methods include signal flow analysis method, alarm analysis method, instrument test method, () and replacement method.
Question263: In the SDH optical synchronous transmission system. Which of the following bytes is used to transmit the quality and usage information of the clock source?
Question264: Which of the following descriptions about the UXCL board and the SXCH board are correct? (Multiple choice)
Question265: AC is the WDM OTM site, and B is the relay site. When the optical fiber in the transmission direction from A to B is interrupted, the WDM side of the OTU relay board at B will report an RLOS emergency alarm and run and process the OTU2_BDI on the upstream side of A. Minor alert. At the same time, the alarm continues to be transmitted to the downstream site of station B. After the alarm is processed at site C, the WDM side of the OTU board at site C will report the ODU2_PM_AILS minor alarm, and return the ODU2_PM_BDI minor alarm to the upstream WDM side of station A
Question266: Which of the following parts does the general encapsulation format of PWE3 consist of? (Multiple choice)
Question267: () is the core equipment of the access network, and is the access convergence point of various services such as voice, data and image
Question268: In the Windows operating system, the log files of the U2000 program itself are stored in which of the following directories of the U2000 installation drive letter?
Question269: When configuring the basic properties of the Ethernet interface of the EM20 single board, the default value adopted for the "maximum frame length" is?
Question270: Which of the following costs is not included in the OOS cost?
Question271: Which of the following statements about MST functional modules are correct? (Multiple choice)
Question272: ODUk SNCP protection subtypes include (), () and ().
Question273: Which of the following options are commonly used instruments or tools in WDM network commissioning? (Multiple choice)
Question274: Which of the following statements is correct?
Question275: Gain is an important index of fiber amplifier, and its unit is decibel.
Question276: If you only need to use LAG for port-level protection, configure non-load-sharing LAG in the board.
Question277: In the Windows operating system, the log files of the U2000 program are stored in the () directory of the U2000 installation disk.
Question278: STM-N signals are transmitted on the line through scrambling mainly to facilitate the receiving end to extract line timing signals. All bytes in the SDH frame structure will be scrambled.
Question279: Which standard encapsulation protocols are defined in MSTP? (Multiple choice)
Question280: The DH function can be used to count the delay and jitter of service packets
Question281: Which of the following options are available for the subtype of ODUk SNCP protection? (Multiple choice)
Question282: Which of the following are the working modes of the SDH network element clock? (Multiple choice)
Question283: When configuring 1+1 optical line protection, you can choose RI1/T01 or RI2/T02 as the working channel according to the actual situation.
Question284: Which of the following options are available for the data dump type on the network management system? (Multiple choice)
Question285: By resetting a single board, restarting a single station, re-delivering configuration, or switching services to a backup channel, it is possible to effectively troubleshoot and restore services in a timely manner. Therefore, maintenance personnel can first rely on their previous experience to deal with faults.
Question286: Which of the following is a functional unit. It provides the interface related to the orderwire telephone and the serial data of the system?
Question287: The VLAN domain can isolate the unicast packets of different users and also isolate the broadcast packets of different VLANs.
Question288: Among OTN network interfaces, the internal network interface of the same operator is an intra-domain interface. The intra-domain interface is divided into indirect laVI of different manufacturers' equipment and IrVI of the subnet interface of the same manufacturer's equipment according to different equipment manufacturers.
Question289: When performing a 10-minute error-free test on a wavelength division channel, the local end uses an SDH analyzer to connect to the client-side interface of the OTU board, and the opposite-end OTU client-side interface needs to perform fiber self-looping. To add solid decay.
Question290: The resources between single-board optical cross-connect configuration and single-site optical cross-connect configuration functions are mutually exclusive. Service scheduling of this wavelength of the board.
Question291: Which of the following description about single-station commissioning is wrong?
Question292: When the OTUK_DEG alarm is detected at the local end, which one is correct about the description of the alarm handling at the upstream site?
Question293: The optical fiber is composed of which of the following parts? (Multiple choice)
Question294: Pointer adjustment is related to which of the following?
Question295: Which of the following description about the path method to create the Client path is wrong?
Question296: Which of the following descriptions about the DM12 board is correct? (Multiple choice)
Question297: When the optical cable is laid by traction, the main traction force should be added to ( ) of the optical cable
Question298: By summarizing the OTU1/2/3 frame rate, the calculation formula of the OTUk frame rate can be obtained. Which of the following is correct?
Question299: Which of the following is the frame structure of STM-16?
Question300: The optical monitoring board cannot receive the optical monitoring signal, and will report () alarm.
Question301: In the fault handling scenario, the loopback method is one of the commonly used fault location methods. Which of the following descriptions about the loopback method is wrong?
Question302: MPLS is not a service or application. It is actually a tunneling technology.
Question303: The OLT is connected to the switch through (), using the V5.2 interface protocol
Question304: How many 64K services can a 2M bandwidth support at most?
Question305: A VC-4 can transmit () VC-12, that is () 2.048 Mbit/s signals.
Question306: The ODUk SNCP protection cannot be switched automatically. Which of the following options is the possible reason? (Multiple choice)
Question307: The cross-connect capacity of the NG SDH system is determined by the cross-connect board, so the upgrade of the cross-connect capacity is accomplished by replacing the cross-connect board.
Question308: Which of the following descriptions about optical layer scheduling is wrong?
Question309: The OOS overhead is the optical layer overhead. Which of the following descriptions about the OOS overhead is wrong?
Question310: When the GE service is encapsulated into the OTN frame structure and the SDH frame structure, the alarms reported by the client-side device are different.
Question311: In the OSN 1800, the LOA single board can implement the Layer 2 scheduling function of the Ethernet.
Question312: Which of the following description about Flexible ROADM is wrong?
Question313: By using the out-of-band FEC technology, the optical signal-to-noise ratio budget of the DWDM transmission network can be improved, and the length of the optical transmission section between DWDM transmission network elements can be increased.
Question314: OChr means use of electrical monitoring techniques
Question315: Both the Ping function and the Traceroute function detect the bidirectional connectivity of the tunnel and PW by exchanging MPLS echo request and MPLS echo reply messages.
Question316: Which of the following factors determine that the optical signal-to-noise ratio (OSNR) at the receiving end is reduced to a certain extent. After the signal is transmitted for a certain distance in the WDM system, the optical signal-to-noise ratio (OSNR) at the receiving end is reduced to a certain extent.
Which of the following is the main reason?
Question317: OTM-nr.m consists of multiplexing of up to n optical channels, r means reduced function (reduced), and does not support non-associated overhead.
Question318: When the input optical power of the amplifier of the OAU at the receiving end is lower than the nominal optical power, which of the following operations are wrong?
Question319: The video system and transmission connection port in the base station are ()
Question320: Which of the following performances do not need to be evaluated when expanding the wavelength division system of the existing network?
Question321: OTUk_DEG indicates that the OTUk signal is degraded. Which option is correct for the following description of the error detection mode? (Multiple choice)
Question322: Which of the following methods are included in the networking and application of NG WDM? (Multiple choice)
Question323: Which of the following is not included in the general encapsulation format of PWE3?
Question324: Among the following boards, which boards support Ethernet L2 switching function? (Multiple choice)
Question325: In an 80-wave system, using the TMB1DAP (TM150AC106) amplifier, the total input power is known to be -19~1 dBm. The typical gain is 19 D, what is the nominal single-wavelength output optical power?
Question326: Which of the following descriptions about the business boundary label is correct? (Multiple choice)
Question327: For OSN series equipment, when the standby board is normal, which of the following operations will not cause the active/standby switchover of the crossover or clock board?
Question328: When R_LOS, RLOF, R_OOF, MUT_LOS and other alarms appear on the device, it means that the service has been interrupted.
Question329: Which of the following description about ODUk ring network protection is wrong?
Question330: Which of the following is the class B address 154.19.2.3 network address?
Question331: The ECC protocol uses the network element ID as the unique identification of the network element. When NCE identifies different network elements in the interface and database, it also uses the network element ID as the keyword for retrieval.
Question332: In the WDM network design, as long as enough EDFAs are cascaded to compensate the optical power loss in the transmission process. Then the system can transmit very long distance without limitation.
Question333: Which of the following measures can be taken when the low-level resources of the device are insufficient? (Multiple choice)
Question334: Which options are wrong in the following description about the ROADM board? (Multiple choice)
Question335: When testing the overload point and sensitivity of the IN port of the OTU board, which of the following is unnecessary?
Question336: Some SNCP protection switching conditions are default. For example, AUAIS and TUAS. Other conditions are optional. For example, HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the service level.
Question337: The frame structure of TU3 is a bit incomplete and needs to fill up the gap. This can effectively prevent which of the following phenomenon from occurring?
Question338: During the commissioning process, it is necessary to ensure that the input optical power of the OTU board is lower than the overload point to avoid burning the optical module or affecting performance. In particular, the overload point of the PIN optical module is very low. Before the actual optical power is measured, the optical fiber is required to be inserted or not inserted.
Question339: In the WDM transmission system, the main factors affecting the unevenness of the power balance of each channel do not include? (Multiple choice)
Question340: When deleting a discrete service, deactivate it first, and check the alarm at this time. If there is no PS, TU-AIS and other alarms, it means that it is a garbage service. If there is an alarm, it means that the analysis is wrong. At this time, it needs to be activated immediately.
Question341: Corresponds to the ISO seven-layer model. Ethernet corresponds to the physical layer and network layer of the seven-layer model, and the specifications defined by Ethernet include the MAC sublayer and the physical layer of the data link layer.
Question342: The optical monitoring channel is set up for the monitoring of WDM optical transmission systems. ITU-T recommends that 1510nm wavelength be used first. Which of the following is the recommended rate?
Question343: During the U2000 dual-system installation and commissioning, the operations that can be performed by the ossuser user are?
Question344: During equipment installation, the Optix OSN 9800 U32 standard subrack cannot be installed in which of the following cabinets?
Question345: Which of the following is the overhead for bit error detection in the OTN frame structure?
Question346: Direct modulation is also called EA modulation. It does not directly modulate the light source, but adds a modulator to the output path of the light source to modulate the light wave. The modulator actually acts as a switch.
Question347: MAC forwarding table: contains which of the following items? (Multiple choice)
Question348: Ring multiplex section protection utilizes K1 and K2 bytes to transmit switching requests to realize automatic protection.
Question349: The number of network elements (including REG) in the two-fiber bidirectional multiplex section shared protection ring may exceed 16.
Question350: The so-called full duplex means that data can be sent and received simultaneously without interfering with each other.
Question351: Which of the following local maintenance terminals can be used to manage MSTP devices?
Question352: When congestion occurs, queuing strategies can be varied. If you need to get services for the first arriving packets, you can use the () queuing strategy; if you want to ensure that the most urgent and critical business is served first, you can use the () queuing strategy: if you need to balance the delay and delay jitter of each flow, you can choose () queuing strategy; if you want to provide professional bandwidth for specific services, you can choose () queuing strategy.
Question353: Regarding the warning AU-AIS, which one of the following statements is correct.
Question354: The fully standardized optical transport unit OTUK is an OTUk frame that fully complies with ITU-T G.709 recommendations, and it has the precise field format, field size and type specified in ITU-T G.709.
Question355: The following three optical layer protections have different protection ranges. Arrange them in ascending order. Which one is the correct one?
Question356: When forwarding packets based on MPLS labels, what actions may the packets need to perform? (Multiple choice)
Question357: Which of the following descriptions about optical combining and splitting boards is wrong?
Question358: The technology of using local oscillator lasers of the same frequency to interfere with the received optical signal, and recovering the amplitude, phase and polarization state information from the received signal is called coherent receiving technology.
Question359: Which of the following statements about extended ECC is wrong?
Question360: In the DWDM system, which of the following options are the main reasons why only 1550nm transmission window is selected instead of 1310nm? (Multiple choice)
Question361: Which of the following descriptions about the PWE3 network reference model is wrong?
Question362: Which of the following statements about PW APS 1:1 protection is correct? (Multiple choice)
Question363: which of the following description about LAG (Link Aggregation Group) is wrong?
Question364: The WDM system mainly adopts the DCM compensation method for the compensation of the chromatic dispersion. In the following description about the DCM dispersion compensation, which one is wrong?
Question365: The NG WDM electrical layer service board supports compatibility mode and standard mode. Compared with the compatibility mode, the standard mode single board only displays the service mapping path under the channel or physical port on the network management, so the standard mode has fewer path levels and is easy to operate.
Question366: The performance indicators of the OTN circuit board focus on the input optical power and bit error rate. Abnormal optical power may cause bit errors. If the input optical power is too high, you can add optical attenuation to the IN port.
Question367: Which of the following descriptions about the business package method is wrong?
Question368: If a ROADM site adopts WSS+RMU configuration, which of the following impact on SOM is wrong?
Question369: Which of the following overhead bytes in VC4 high-order path overhead is functionally similar to the low-order path overhead byte V5 in VC12? (Multiple choice)
Question370: Which of the following is the networking method of parallel FOADW stations?
Question371: When the sender detects that the b6-b8 of the K2 byte is 110, it means that the sender has reported () an alarm.
Question372: The use of QPSK modulation can reduce OSNR requirements and fiber nonlinear hazards, improve dispersion tolerance PMD tolerance, etc.
Question373: Which of the following statements about MSP rings are true? (Multiple choice)
Question374: Milliwatts (m) and () (dBm) are two commonly used optical power units, the former is linear, and the latter is nonlinear.
Question375: In a WDM network, if both the bidirectional OA and OSC report an optical loss alarm, which is the most likely reason?
Question376: The reason for bit errors is mainly the () and () of the transmission system
Question377: Which of the following data does not belong to the network layer data on the network management side?
Question378: Which of the following are the configuration modes of the new NE? (Multiple choice)
Question379: Which of the following is the common point between the two-fiber bidirectional multiplex section shared protection ring and the four-fiber bidirectional multiplex section protection ring?
Question380: It is not recommended to configure the EPLAN service as a ring. If the EPLAN business is configured as a ring network, the STP protocol must be enabled on the network to prevent broadcast storms.
Question381: The nominal rate of the OTU4 signal is 111 809 973.568 kbit/s, and we generally think that the line rate is about 112G.
Question382: Compared with PDH, the main advantages of SDH are reflected in which of the following aspects? (Multiple choice)
Question383: Which of the following is the basic requirement of the DWDM system for the light source?
Question384: The collection and storage of on-site data includes regular collection when the equipment is in normal operation and collection when the equipment fails the network. Generally, before troubleshooting, maintenance personnel must first collect and save on-site data.
Question385: The optical and electronic racks of the OSN 9800 equipment communicate through master-slave sub-rack cascading, and are connected through the GE1/2 ports on the CTU single board.
Question386: What are the options for the logical function modules involved in clock information processing? (Multiple choice)
Question387: The DWDM system has extremely high requirements on the stability of the light source. Which of the following factors affect the stability of the light source? (Multiple choice)
Question388: Before creating an optical cross-connect, it is necessary to manually configure the corresponding port of the corresponding board as a boundary port, for example, the line-side port of the FIU board between two sites.
Question389: The four elements of the WDM network are () dispersion, () and nonlinear effects.
Question390: Which of the following commissioning ranges should the optical power of each single wave before combining (that is, the input optical power of the combining board) be within?
Question391: The ODUK serial connection monitoring overhead (TCM) of OTN supports multiple monitoring modes. Which one of the following options is wrong?
Question392: When the 2M PDH signal is mapped into VC12, the mapping method used is ().
Question393: For OSN6800 equipment, which of the following slots does not have an electrical layer crossover backplane bus?
Question394: The unprotected chain consists of four network elements: NE1.NE2.NE3 and NE4. Create an end-to-end VC4 path NE1-NE4. Add NE5 between NE2 and NE3 for capacity expansion. The original configuration remains unchanged. No service is configured on NE5.
In this case, the unprotected chain becomes NE1-NE2-NE5-NE3-NE4, how many VC4 paths can be searched out?
Question395: ITU-T stipulates, what is the switching gain requirement of the Raman amplifier equal to how many DB?
Question396: After configuring the PDH service on a per network element basis. The complete trace cannot be searched.
Which of the following is a possible cause? (Multiple choice)
Question397: Which of the following are the basic functions of U2000? (Multiple choice)
Question398: Which of the following network element users belong to the debug level?
Question399: In a 40-wave system, using a DAP (TN150AC106) amplifier, the total input power is known to be -16 to 4dBm, and the typical gain is 16dB. What is the nominal single-wave output optical power?
Question400: After enabling TCM monitoring, when the upstream station detects a LOF alarm, it will plug in the IAE local end and report the ODU1_TCMn_IAES performance event.
Question401: Which of the following statements are correct? (Multiple choice)
Question402: SDH signals must be scrambled before being transmitted over optical fiber.
Which of the following bytes is not scrambled? (Multiple choice)
Question403: In the scenario of setting the timeout period type of the LACP message, which of the following options are correct for the type of the timeout period of the message? (Multiple choice)
Question404: Which of the following is the object protected by the channel protection ring?
Question405: Which of the following bytes in the regenerator section overhead are associated with ROOF and R-LOF? (Multiple choice)
Question406: Which of the following description of Tunnel APS protectionis wrong?
Question407: Which of the following is not a function of RSVP-TE?
Question408: OptiXtrans DC908 can predict faults based on trends and volatility, predict all gradual faults in advance, and realize from passive operation and maintenance to active operation and maintenance.
Question409: Which of the following levels does the U2000 network management belong to?
Question410: Which of the following descriptions about optical line protection is wrong?
Question411: For a system without an optical amplifier, the upper threshold of the received optical power of the wavelength division side of the OTU single board and the line single board is -3 dB at the receiving overload point of the optical module.
Question412: In the early stage of the project, the commissioning of the coherent system can properly improve the performance by increasing the transmitted optical power.
Question413: The basic principle of fault location is to accurately locate the fault to a single station or even a single board.
Question414: The essence of QPSK modulation is to select 4 possible values on the optical field phase, so that the baud rate can be reduced by half without reducing the line rate.
Question415: Which of the following situations can cause the board to reinsert the BDI maintenance signal to the upstream site? (Multiple choice)
Question416: When the BIP-8 in the OTUk section monitoring overhead SM detects an error block, what alarm may be reported? (Multiple choice)
Question417: When the receivable TTI and the actual receipt TTI of the PM layer are inconsistent, which of the following statements about the reported alarm is wrong? (Multiple choice)
Question418: The OptiX NG WDM device only supports the global label control, and the size of the label control is 32768.
Question419: The SL64 board is available for the OSN2500.
Question420: The alarm detection of the optical layer overhead is realized through the optical layer overhead OOS. Which of the following descriptions about the optical layer overhead alarm is correct?
Question421: Which of the following statements is correct about the alarm caused by the mismatch? (Multiple choice)
Question422: Which of the following descriptions about the function of MPLSOAM is wrong?
Question423: Which of the following bytes is the negative adjustment position of the TU pointer?
Question424: In the electrical layer overhead processing-sink function, when the signal flow is from OCh to Client, first detect PMODUkP; then detect TCM ODUKT.
Question425: The core device of ROADM is the wavelength selective switch (WSS)
Question426: Which of the following options is the low-loss area of single-mode fiber? (Multiple choice)
Question427: The dispersion coefficient is the time delay difference caused by the optical wavelength signal passing through the unit length of optical fiber in the unit wavelength interval, so which of the following is the unit of the dispersion coefficient?
Question428: The optical amplification unit can make up for the line loss and increase the transmission distance, and the system transmission distance can be extended to infinity through multi-level cascading.
Question429: Which of the following options conform to the principles of coherent system commissioning? (Multiple choice)
Question430: Reasons which is impossible for OTN equipment and network elements to be disconnected frequently?
Question431: OTUk_ENC indicates that the OTUk bit error exceeds the threshold. What are the options for the following description of the bit error detection horizontal mode? (Multiple choice)
Question432: In the WDM system, if the TTI to be sent by the SM layer is inconsistent with the TTI to be received, an ( ) alarm will be reported.
Question433: Among the following options, which ones belong to MPLS-TP OAM detection objects? (Multiple choice)
Question434: Which of the following is the database used by U2000 on PC/WIN2003?
Question435: For coherent system commissioning, according to the optical power of each wavelength monitored by the OPM8 single board or the spectrum analyzer, to what range should the optical power difference of each wavelength be adjusted at the equalization station?
Question436: Which of the following is correct in describing the order in which the signal flow between the SDH interface and the crossover unit flows through the module unit?
Question437: The transmission plane mainly completes functions such as optical signal transmission, multiplexing, configuration protection switching, and switching and connection. And ensure the reliability of the optical signal transmitted. However, the exchange action at this layer is carried out under the action of the management plane and the control plane.
Question438: Which of the following descriptions about the commissioning of the hybrid transmission system of 100G and 10G is wrong?
Question439: Which of the following boards can realize the broadcast function of service signals in the receiving direction? (Multiple choice)
Question440: E&M signals define a connection type between a relay device and a signaling unit. Which of the following are relay devices?
Question441: In the path search process of the U2000 network management, the path search management module first scans the cross-connections of each network element, constructs sub-paths according to the cross-connections of adjacent network elements, and tries to merge these sub-paths at the same time. Which of the following sub-paths is legal?
Question442: Regarding the description of OSS, which is wrong?
Question443: Which of the following is not an optical layer single board in a WDM network?
Question444: The OAU board at the 48-wave OTM site completes signal amplification.
Question445: SDH&PDH tester is mainly used to test OTU's jitter, bit error characteristics and other indicators, and it can also be used as a test signal source to provide test signals for OTU.
Question446: Which of the following operations will directly or indirectly cause business interruption? (Multiple choice)
Question447: In the fault handling scenario, which of the following descriptions about the basic principles of fault location is wrong?
Question448: The value range of AU-PTR is 0~782. Which of the following alarms will be generated when the receiving end receives invalid pointer value for 8 consecutive frames?
Question449: Which of the following are the main application scenarios for single-board compatibility and replacement? (Multiple choice)
Question450: Which of the following descriptions about PM_BIP8-related alarms is correct?
Question451: If a network port that supports auto-negotiation is connected with a network port that does not support auto-negotiation, half-duplex to full-duplex may occur.
Question452: The ODUk serial monitoring overhead supports multiple maintenance signals. When the ODUk_TCM_LCK maintenance signal is generated, which of the following is detected by STAT?
Question453: Which of the following description about QPSK modulation technology is wrong? (Multiple choice)