Huawei H31-311_V2.5 問題練習

Question No : 1
The maximum transmission distance of Ethernet depends on factors such as line quality and signal attenuation .

• A.True
• B.False

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Question No : 2
Which of the descriptions about the FIU board is correct?

• A.The FIU board processes monitoring information.
• B.FIU can complete the access and solution of OSC channel.
• C.In OptiX OSN 880 0 equipment, when there is no signal input, the FIU board will report an alarm.
• D.Whether it is an OLA station or an OADM station, a station only needs one FI

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Question No : 3
The physical layer of LAN is often used for the interconnection of routers and switches. Although it is called a local area network, if a 10GBase-LR or -ER optical module is used, the transmission distance can reach 80 kilometers.

• A.True
• B.False

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Question No : 4
If a bit error is detected in the B2 byte, the peer end will report the following alarm.

• A.MS-AIS
• B.RS-BBE
• C.MS-FEBBE
• D.MS-BBE

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Question No : 5
TM is a terminal multiplexer. Its function is: the line port inputs/outputs one STM-N signal, and the branch port can output/input multiple low-speed branch signals.

• A.True
• B.False

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Question No : 6
Which of the following descriptions are correct? (Multiple choice)

• A.The difference between a 1+1 linear multiplex section and a 1:1 linear multiplex section is whether APS is required.
• B.The 1:1 linear multiplex section can be equipped with additional services, and its switching mode is only double-ended recovery switching.
• C.Whether it is a two-fiber bidirectional MSP ring protection ring or a four-fiber bidirectional MSP ring, there are requirements for the nodes in the ring. The main reason is that it is determined by the K1 and K2 bytes in the APS protocol.
• D.The APS protocol of the four-fiber bidirectional multiplex section protection ring is carried by the protection optical fiber.
• E.The protection mode of SNCP protection is " double transmission, selective reception", which is especially suitable for decentralized services.

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Question No : 7
The comb filter is an active optical device, its main function is to couple or separate odd and even waves in the same band.

• A.True
• B.False

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Question No : 8
If a bit error occurs in the SDH network, the service signal recovered after the signal is decapsulated must have a bit error.

• A.True
• B.False

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Question No : 9
Which of the following boards supports the QinQ function?

• A.EFT8
• B.EGT2
• C.EMS4
• D.EMR2

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Question No : 10
QinQ technology is a technology of VLAN nesting. QinQ complies with IEEE 802.1q recommendations, and it is also a technology of VLAN extension.

• A.True
• B.False

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Question No : 11
Which of the following statements is incorrect.

• A.In the connection model of MPLS VPN, the network is composed of the backbone network of the operator and each site of the user. The so-called VPN is the division of a site set, and a VPN corresponds to a set composed of several sites.
• B.The network construction of MPLS VPN is completed by the service provider. In this network structure, the service provider provides VPN services to users, and users do not feel the existence of a public network, as if they have independent network resources.
• C.For the backbone routers inside the backbone network of the service provider, that is, the routers that are not directly connected to the edge routers, they do not know the existence of the VPN, and are only responsible for data transmission within the backbone network.
• D.All VPN construction, connection and management work is carried out on the backbone router.

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Question No : 12
Which of the following is the monitoring overhead for monitoring and reporting OTUk_DEG and OTUk_EXC alarms?

• A.SM
• B.PM
• C.TCMi

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Question No : 13
K1 and K2 bytes can transmit APS switching signaling, and can also indicate that the signal of the multiplex section is invalid.

• A.True
• B.False

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Question No : 14
Which of the following situations can cause the board to reinsert the BDI maintenance signal to the upstream site? (Multiple choice)

• A.The board reports R_LOS
• B.Report OTU2_DEG on the board
• C.Report OTU2_LOF on the board
• D.ODU2_PM_LCK

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Question No : 15
After mapping and multiplexing, 4 channels of ODU2 signals can be multiplexed into 1 channel of OTU3[ V ] signal, while for ODU2e signal, only 3 channels are needed to be multiplexed into 1 channel of OTU3 [V] signal.

• A.True
• B.False

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