Free Access Huawei.H31-311_V2.5.v2026-06-11.q157 Practice Test (Page 25)

A 2.2m cabinet can accommodate up to which of the following OSN 2500 sub-racks?

A.1

B.3

C.2

D.4

A bidirectional ring means that the routes for sending and receiving services are consistent, that is, they correspond to consistent routes.

A.False

B.True

In the Colored & Directed scenario of 4D ROADM, how many sets of M40V+D40 are needed to dispatch local services to four directions?

A.9

B.5

C.4

D.1

The error correction capability of FEC is measured by coding gain. Which of the following statements about coding gain is wrong?

A.When BER is constant, the OSNR preserved by correction coding is called coding gain.

B.The coding gain of AFEC is greater than the coding gain of FEC

C.The coding gain of in-band FEC is greater than the coding gain of out-band FEC

D.The correction capability of FEC increases with the coding gain.

TU-AIS is often encountered during network maintenance. Which of the following alerts can trigger a TU-AIS alert? (Multiple choice).

A.AU-LOP

B.R-LOS

C.HP-TIM

D.B2-EXC

Other Version: 852Huawei.H31-311_V2.5.v2026-03-12.q307; 2057Huawei.H31-311_V2.5.v2024-10-03.q257; 3720Huawei.H31-311_V2.5.v2022-08-18.q73

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