H31-311 Online Practice Questions and Answers

TU-AIS is frequently encountered during network maintenance. Which of the following alarms can trigger the TU-AIS alarm? (Multiple Choice)

A. AU-LOP

B. R-LOS

C. HP-TIM

D. B2-EXC

Which of the following are the main advantages of SDH? (Multiple Choice)

A. Standard interfaces

B. Synchronous multiplexing

C. Powerful OAM

D. High compatibility

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

PDM uses the polarization beam splitter to divide the laser into two perpendicular directions: x and y.

A. TRUE

B. FALSE

Which of the following is the basic requirement of a DWDM system on a light source?

A. The output wavelength is stable.

B. The direct modulation method is used.

C. The dispersion tolerance is low.

D. The transmit power is high.

When a bridge uses the IVL learning mode, the entry in the MAC address table is created according to the source MAC address and source port of the data frame. This entry is valid for all VLANs.

A. TRUE

B. FALSE

Which of the following is the maximum number of OSN 3500 subracks that can be installed in a 2.2 m cabinet?

A. 1

B. 2

C. 3

D. 4

Both PDH and SDH have globally unified standards.

A. TRUE

B. FALSE

A 1510 nm optical supervisory channel can be effectively amplified after it passes an EDFA.

A. TRUE

B. FALSE