EMT Practice Test

1. Question Content...

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Question1: Which of the following is the difference between an AU pointer and a TU pointer? (Multiple choice).

Question2: In MSP networking, when the optical fiber is connected between sites, the east light plate of the site is connected to the west light plate of the downstream site, and these stations are connected in turn to form a ring. In this case, the direction from the toko plate of the site to the wine light plate of the downstream station is the direction of the main ring, and the direction of forming the ring is the direction of service.

Question3: Which of the following are the service board types for MSTP devices? (Multiple choice).

Question4: Which overhead below 112 is not ODUk overhead?

Question5: Which of the following maintenance signals is transmitted from the downstream site to the upstream site of the OTN?

Question6: Which of the following is not a nonlinear effect?

Question7: U2000 can flexibly interconnect with different third-party network administrators through the Northbound Interface (NBI) and provide physical inventory and alarm information for the upper-layer network management.

Question8: In WDM systems, it is ideal to use a dielectric thin film filter (TFF) when using less than () wavelengths.

Question9: When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)

Question10: Linear MSP (LMSP) has two modes: 1+1 and 1:1. Additional services can only be configured for the protection channel in 1:1 mode of the LMSP.

Question11: When the J1 byte does not match, an alarm () is reported and the service may be interrupted.

Question12: Optical module parameter "L-64.2" in the "2" indicates which of the following working windows?

Question13: The segment overhead of STM-4 is () bytes/frame.

Question14: When the working PQ1 board is oversized, the device will perform and the TFS protection will be reversed.
Which of the following statements about the switching process are correct? (Multiple choice).

Question15: Which of the following is the steps to multiplex a low-speed service into a high-speed SDH service?
(Multiple choice).

Question16: The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().

Question17: Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?

Question18: In the case of a 1+1 linear MSP, which of the following switching modes does not require the APS protection protocol full (multiple choice) to be enabled

Question19: When using a script to back up and restore network configuration data for the U2000, you can change the directory where the export file is saved.

Question20: For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?

Question21: Which of the following is the basic requirement of the DWDM system in the light source?

Question22: During service configuration, there are two time slot modes. Huawei uses interleaved time slot mode by default.

Question23: The AAC address consists of 46 bits and is globally unique
Which of the following - is the meaning of the eighth-digit MAC address with 1?

Question24: The receiver performs a BIP-8 check on unscrambled STM-16 frames. If the BIP8 check result XOR , the value of the B1 byte contained in the next STM16 ring is 10001100, which indicates STM-16 There is a () bit False block in the axis.

Question25: OChr means the use of electrical monitoring technology.

Question26: Fiber loss includes bending loss, absorption loss and scattering loss.

Question27: Which of the following layers define the protocols that control the network layer? The protocol for this layer applies to logical links, i.e. end-to-end connectivity between two devices.

Question28: STM-64 has an () AU pointer.

Question29: Which of the following is photolayer tracking? (Multiple Choices)

Question30: Which of the following statements regarding the sequence of signal flows between the SDH interface and the cross-connecting unit is correct?

Question31: WDM transmits optical signals multiplexed at multiple rates (wavelengths) through a single optical fiber, and the digital signals carried by these optical signals must have the same rate and data format

Question32: In the system control unit, which of the following databases does not lose data after a power failure?
(Multiple choice).

Question33: Which of the following is the VLAN classification method? (Multiple choice).

Question34: The clock unit can only access the external clock source as the timing signal source of the system through the external clock interface. In addition; It can also output a processed clock and provide a clock source for other devices that need timing.

Question35: Which of the following is the meaning of SFD in the Ethernet frame structure?

Question36: Which of the following statements about the clock source are incorrect?

Question37: Which of the following alarm/event storage modes does U2000 support? (Multiple choice).

Question38: Which of the following statements about extending the ECC is incorrect?

Question39: OSN1500/2500/3500/7500 supports DC and AC power inputs.

Question40: A PAUSE frames use reserved multicast addresses and are not forwarded by bridges or switches. In this way, the PAUSE frame does not generate any additional information.

Question41: Which of the following is the frame indicated by the VC-4 J1 byte by the AU pointer of the current frame?

Question42: For alignment; Indicates the starting position of VC-n in the corresponding AU or TU frame. * This way: The receiver can correctly remove the corresponding VC from STM-N, and then The VC and C packages are separated into separate low-rate signals, such as PDH, which means that the low-rate path signal can be dropped directly from the STM-N signal.

Question43: An unprotected chain consists of four net elements; ME1, NE2, NE3 and NE4.
Create an end-to-end VC4 path NE1-NE4 and add NE5 between NE2 and NE3 for capacity expansion.
The original configuration remains unchanged and no services are configured on the NE5.
In this case, the unprotected chain becomes NE1-NE2-NE5NE3-NE4, how many VC4 paths can be searched?

Question44: Optical module parameter "L-64.2" in "2" indicates which of the following working windows?

Question45: In the case of SNCP, the board selectively receives the service. Therefore, SNCP can protect services on the line.

Question46: Which of the following is the electrical layer cost of OTN? (Multiple choice).

Question47: The index is used to folio and delineate the starting position of VC-n in the corresponding AU or TU frame so that the receiving end can correctly remove the corresponding VC from the STM-N The VC and C packages are then separated into separate low-rate signals, such as PDH That is; Low-rate branch signals can be discarded directly from the STM-N signal

Question48: Which of the following statements about the EFS4 board are correct? (Multiple choice).

Question49: According to ITU-T's recommendations, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of net elements on the entire ring network is less than 16.

Question50: When the ACT indicator of the SDH board is off, it means that the board has a hardware failure and cannot be used.

Question51: When configuring LMSP, there are two switching modes: single-ended switching and double-ended switching. Single-ended switching does not require the protection protocol to be enabled.

Question52: In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and weight and usage information of the clock source?

Question53: In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than () wavelengths.

Question54: PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.

Question55: Coherent receiver technology uses a local oscillator laser with the same frequency as the received signal to perform coherent processing and recover () information from the received signal. (Multi-quality selection.)

Question56: Only one TCM can be used at one site

Question57: Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).

Question58: According to the formula "ODUk rate = 239/(239k) x STM-N frame rate", ODU4 The rate is equal to the
239/235xSTM-N Pa rate.

Question59: Which of the following is affected by changing the element ID of OSN3500 on NMS?

Question60: The number of ODU2e signals multiplexed into the ODU3 signal is the same as the number of ODU2 signals multiplexed into the ODU3 signal.

Question61: When configuring VLAN-based service types, which of the following features must be enabled on the port?

Question62: Which of the following are communication quality alerts? (Multiple choice).

Question63: The value of the MFAS byte increases with the sequence number of the OTUk/ODUK base frame and includes the most () base frames.

Question64: Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).

Question65: Configuring the EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring network, the STP protocol must be enabled on the network to prevent broadcast storms.

Question66: The Raman amplifer uses which of the following effects?

Question67: Which of the following is the multiplexing method of SDH?

Question68: The optical amplifier unit compensates for line losses and extends the transmission distance. Connecting multiple optical amplifier units in cascaded mode allows for extended transmission distances without following the system.

Question69: When the U2000 is synchronized, the same network metadata as the U2000 is not uploaded to the U2000, and the data that exists on the U200 but does not exist on the network element is deleted.

Question70: Which of the following can be configured as the monitoring time for network element performance events?

Question71: Which of the following methods can be used to multiplex low-order ODUK to higher-order ODUk?

Question72: When the low-level resources of the device are insufficient, which of the following measures can be taken?
(Multiple choice).

Question73: When the sender detects that the b6-b8 of the K2 byte is 110, it means that the sender has reported an alarm ().

Question74: Which of the following logical function modules is used to generate exhaust R-LOS alerts?

Question75: LCK insertion takes precedence over AIS insertion. That is, if the user configures LCK insertion and the conditions for automatic AS insertion are met, the LCK is inserted.

Question76: Which of the following different types of ESC are divided according to the principles of implementation?
(Multiple choice)

Question77: When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported?
(Multiple choice).

Question78: What of the following operations may interrupt the network element service? (Multiple choice).

Question79: Which of the following statements about the advantages of OTN are incorrect?

Question80: Manual configuration will clear the data on the NE side

Question81: When the bridge uses ivl learning mode, an entry in the MAC address table is created based on the source MAC address and source port of the teach frame. This entry applies to all VLANs

Question82: If a network port that supports autonegotiation is connected to a network port that does not support autonegotiation, you can interconnect in both half-duplex and full-duplex modes.

Question83: The rate of SF64 and SL64 boards is STM54. Therefore, the two plates can be interconnected.

Question84: The scope of management of OMSn is the path from the input optical port on the multiplexer unit of the sending site to the output optical port on the multiplexer unit of the receiving site, called the optical multiplexing segment (OMS) path.

Question85: In the Windows operating system, the log files of the U2000 program are stored in the () directory of the U2000 installation disk.

Question86: Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF?
(Multiple Choices)

Question87: Compared with dense wavelength division multiplexing (DWDM) systems, crude glass division multiplexing (CWDM) systems provide a certain amount of glass length and transmission distance within (kmkm), which greatly reduces system cost and has strong flexibility

Question88: The number of bit False blocks on each VC4 channel is detected by B3 on the receiving side. At the same time, the information is sent back to the sender via Q, and HP-REI and HP-FEBBE report on the sender.