EMT Practice Test

1. Question Content...

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Question1: In the GPON system, the GEM frame is the smallest bearer unit. Which of the following cell formats can be carried by the GEM frame? (Select All that Apply)

Question2: The customer needs to access the following information points: AP, PC, IP camera, and IPTV. The AP is powered by the ONU. The types of ONU interfaces include:

Question3: DHCP implements centralized management of IP addresses. The DHCP server, DHCP client, and DHCP relay exchange packets to distribute key parameters, including the IP address, subnet mask, gateway, and DNS. In addition, DHCP provides a conflict detection mechanism to prevent communication failures caused by IP address conflicts.

Question4: Which of the following protocols works at the transport layer and is connectionless-oriented?

Question5: The PADT packet in PPPoE is used to terminate a session.

Question6: The pigtail type of the PON optical port is:

Question7: The OLT is interconnected with a LAN switch through the GE optical port. The working modes of the two ports can be either auto-negotiation or forced.

Question8: ADSL G.992.1 (G.dmt) is a technical specification that does not require a signal splitter.

Question9: Based on the board high availability principle, the MA5800 can use the service board of the MA5608T.

Question10: In the downstream direction of the GPON, all ONUs receive the same data because the broadcast mode is adopted. In the upstream direction, because the same optical splitter is used, the data of a branch fiber can also be received by another branch fiber.

Question11: Access-layer devices are required to provide access for a large number of information terminals on both telecom networks and campus networks. Access-layer devices use various technologies. Huawei's broadband
"access network" devices refer to the copper line access devices that mainly use the xDSL technology and the optical access devices that mainly use the PON technology.

Question12: A trunk interface allows packets from VLAN 100, VLAN 200, and VLAN 300 to pass through. However, only packets from VLAN 100 and VLAN 200 carry tags, and packets from VLAN 300 do not carry tags.
Which of the following is the possible cause?

Question13: Which of the following indicator status indicates that the MA5600T/MA5680T control board is running properly?

Question14: The routing table of a router contains the following two entries:
Destination/Mask Protocol Pre Cost Nexthop Interface
9.0.0.0/8 OSPF 10 50 1.1.1.1 Serial0
9.1.0.0/16 RIP 100 5 2.2.2.2 Ethernet0
If the router needs to forward packets with the destination address of 9.1.4.5, which of the following statements is correct?

Question15: The OLT supports QinQ and VLAN stacking attributes. Which of the following VLANs supports QinQ?

Question16: Which of the following are access network VLAN types? (Select All that Apply)

Question17: The SNMP protocol is at the ( ) layer in the TCP/IP protocol stack?

Question18: When configuring a bridging ONU, how do you set the VLAN of the ETH1 port if the ETH1 port is used for a PC to access the Internet?

Question19: On an Ethernet network, ARP packets are classified into ARP Request packets and ARP Response packets. In the initial communication phase, how are ARP Request packets transmitted on the network?

Question20: Which of the following VLAN types is not supported by the MA5600T/MA5680T?

Question21: When adding an ONU to the OLT, if Control flag is deactive, run the ont activate command in GPON port mode to activate the ONU.

Question22: GPON is an Ethernet-based passive optical access technology that complies with IEEE 802.3ah.

Question23: Which of the following statements about the test of the mean optical transmit power of an optical interface is incorrect?

Question24: In a 2.4 GHz frequency band, three sub-channels that do not interfere with each other can be used simultaneously.

Question25: Which one of the following protection schemes can protect branch fibers?

Question26: By default, FEC is enabled in the downstream direction in the 10G GPON system, without occupying the downstream bandwidth.

Question27: Which of the following methods can be used to test the reset of an OLT board?

Question28: In a GPON network, DBA has the following functions:

Question29: The MA5800 supports upstream transmission through the control board or upstream board, and supports 10 GE/GE upstream transmission. The upstream port supports 10 GE upstream transmission by default. You can run the speed command to set the upstream port. To prevent the communication failure with the upper-layer device, the upstream port rate must be the same as the port rate of the interconnected device.

Question30: The 48-bit MAC addresses of computer network interface cards are allocated by the IETF to vendors and globally unique.

Question31: Generally, an OLT is a switch or router and a multi-service provisioning platform.

Question32: The OLT supports VLAN tag translation. When the SVLANs with different attributes are used to create service flows through the service port, if tag-transform is set to default, the tag conversion rules are different.

Question33: In a traffic profile, the traffic rate can be configured, but the packet priority cannot be set.

Question34: In Huawei access network products, which of the following VLANs contain two VLAN tags? (Select All that Apply)

Question35: In a GPON system, dynamic bandwidth assignment (DBA) needs to be configured for ONU upstream transmission. What are the functions of DBA?

Question36: Which technology is used by vectoring to cancel inter-VDSL2 line crosstalk in downstream?

Question37: When the IP address lease of a DHCP client reaches a specified point, the DHCP client renews the IP address lease. The number of times for sending renewal packets decreases as the number of times for IP address renewal increases.

Question38: What kind of DSL line will affect vectoring performance significantly at a site?

Question39: Which of the following protocols are included in Point-to-Point Protocol (PPP)? (Select All that Apply)

Question40: Ethernet switches work in the ( ) layer of the OSI model.

Question41: To facilitate subsequent management, a university wants to use double-tagged VLANs. The inner VLAN tag is used to identify users, and the outer VLAN tag is used to identify services. Which VLAN attribute should be used?

Question42: By default, ONUs connected to the same PON port of a Huawei OLT can communicate with each other at Layer 2 if they use the same service VLAN.

Question43: During routine O&M, you can run the display ont info command to query the running status (Run state) of the ONU. Which of the following states indicates that the ONU is in the online state?

Question44: When other SNMP parameters are correctly configured, how to configure the Trap source address of a device to ensure that the NMS can receive device alarms normally?

Question45: Which of the following statements about the loss of fiber connection points is correct?

Question46: According to the ITU-T G.984.X series standards, the downstream transmission wavelength of the GPON network is ( ) nm.

Question47: When carrying services, the GEM port needs to map services to the T-CONT units for upstream service scheduling. Each ONU supports multiple T-CONTs, and different types of T-CONTs can be selected for different service types.

Question48: Which of the following statements about MIB is incorrect?

Question49: The ONU connected to the GPON port can go online normally. However, when you run the display ont info command on the OLT to query the ONU information, "Match state" is displayed as mismatch. The possible causes are:

Question50: The OLT supports multiple protection switching modes for GPON lines. The ( ) technology is supported by the OLT to protect the backbone and branch optical fibers at the same time.

Question51: If you want to test the optical transmit power of the ONU, connect a common power meter to the upstream port of the ONU and select the 1310 nm wavelength to read the power value.

Question52: Which of the following commands can be used to query the receive optical power of an ONU?

Question53: When adding an ONT to the OLT, you need to: