H31-311 Online Practice Questions and Answers

The EPL service exclusively uses bandwidth on the line, which is highly secure. It is applicable to the private line application of VIP customers.

A. TRUE

B. FALSE

OTM nr.m consists of a maximum of "n" optical multiplexing channels and does not support non-channelassociated overheads. The letter "r" indicates function reduction.

A. TRUE

B. FALSE

Which of the following is not the advantage of WDM?

A. Ultra-large capacity and transparent data transmission

B. Easy to upgrade and maximizing the protection for existing investments

C. Completely substituting for SDH devices

D. Compatible with all optical switching networks in the future

For an OSN 3500, which of the following boards provides the centralized backup function for the +3.3 V power supply of each board in the subrack?

A. PIU

B. AUX

C. COA

D. SCC

When a fiber cut test is performed on a normal MSP ring, which of the following alarms is reported? (Multiple Choice)

A. TU-AIS

B. R-LOS

C. APSJNDI

D. BD STATUS

Which of the following maintenance signals is transmitted from a downstream site to an upstream site in OTN?

A. ATS

B. LCK

C. IAE

D. BDI

When the U2000 data is backed up using scripts, the backup is fast because the backup files are small.

A. TRUE

B. FALSE

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

A. G1

B. S1

C. N1

D. M1

The Kl and K2 bytes can transmit APS switching signaling, and can also indicate that the multiplex section signal fails.

A. TRUE

B. FALSE

Optical fiber loss includes the bending loss, absorption loss, and scattering loss.

A. TRUE

B. FALSE

Which of the following are the electrical-layer overheads of OTN? (Multiple Choice)

A. OPUk

B. ODUk

C. OCh

D. OTUk

Which of the following statements about overhead bytes is incorrect?

A. A1 and A2 are framing bytes. These bytes are used to separate STM-1 frames in a signal flow.

B. J0 is a regenerator section trace byte. This byte is used to repeatedly transmit a section access point identifier, so that the receive end can verify its continuous connection to the specified transmit end.

C. B1 is bit interleaved parity-8 (BIP-8). This byte is used to monitor bit errors at the regenerator section layer.

D. E1 and E2 are orderwire bytes. These bytes are used to provide a voice channel for orderwire connections.

The TAG attribute cannot be set for the internal port VCTRUNK of the board on the NMS.

A. TRUE

B. FALSE

The SP3D board supports 63 El services.

A. TRUE

B. FALSE

The value of the MFAS byte increases with the sequence number of the OTUk/ODUk base frame, and a maximum of ( ) base frames are included.

A. 64

B. 128

C. 256

D. 512