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H31-311 Exam Questions & Answers

Exam Code: H31-311

Exam Name: HCIA-Transmission V2.5

Updated: Apr 29, 2024

Q&As: 199

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Practice These Free Questions and Answers to Pass the Transmission Exam

Questions 1

Which of the following is the meaning of SFD in the Ethernet frame structure?

A. Preamble

B. Frame check sequence

C. Start frame delimiter

D. Payload

Show Answer
Questions 2

SES: There are 5% or more than 5% bit error blocks or at least one defect (OCI/AIS/LCKAAE/LTCA1M/ PLM) within one second.

A. TRUE

B. FALSE

Show Answer
Questions 3

Which of the following statements about the optical-layer interfaces OTM-n.m and OTM-nr.m of OTN is incorrect?

A. n indicates the number of wavelengths carried by the maximum capacity.

B. m indicates the rate. The value can be 1, 2, or 3.

C. r indicates OTM without the OSC function.

D. OTM-nr.m with OSC signals is OTM-n.m.

Show Answer
Questions 4

The frame period of OTN signals is fixed, which is the same as that of SDH signals.

A. TRUE

B. FALSE

Show Answer
Questions 5

Which of the following factors determines that the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent. Which of the following is the main cause?

A. EDFAs are used.

B. Multiplexers and demultiplexers are used.

C. New types of optical fibers are not used.

D. Fiber attenuation is excessively high.

Show Answer

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