H31-311_V2.5 試験問題を無料オンラインアクセス

Which of the following options are correct regarding 1:1 optical line protection? (Multiple choice)

• A.1:1 optical line protection does not use the method of splitting the optical signal into two paths, but uses an auxiliary light source to emit light, so the insertion loss introduced is smaller than that of 1+1 protection.
• B.1:1 fiber protection can be set to single-end switching or double-end switching
• C.1:1 optical line protection requires APS protocol
• D.1:1 protection only supports dual-end switching

Which of the following options are considered to be deficiencies of OTN? (Multiple choice)

• A.Bandwidth adjustment is not flexible
• B.Insufficient flexibility, the minimum pipe is ODUO 1.25G
• C.Insufficient resource utilization
• D.OAM function is not strong
• E.Latency is not low enough

STM-64 has () AU pointer.

• A.4
• B.64
• C.16
• D.1

The number of signals multiplexed from ODU2e and ODU2 to ODU3 is 4.

• A.False
• B.True

The bits of the S1 byte represent the clock quality level. Which of the following indicates the highest clock quality level?

• A.S1=00010100
• B.S1=00100010
• C.S1=00001111
• D.S1=00100100