最新的Nokia 4A0-255免費考試真題

問題1

Consider two EDFA amplifiers in cascade. Each EDFA has an average input signal power of 10 mW and an average noise power of 1 mW. What is the OSNR of the system at the receiver.

A. 20 dB

B. 10 dB

C. 5 bB

D. 7 dB

正確答案: A

問題2

Consider the exhibit. The grey sites (Site 1 through Site6) from an existing network, which will be extended by adding Site7 and Site8. Which of the following is NOT a common source of interoperability issues for this network extension?

A. Regeneration requirements at Site5

B. Cascading in the existing network

C. Spectrum grid of the extension

D. Fiber connectors at Site6

正確答案: D

問題3

Which if the following statements about Recovery Time Objective (RTO) and Recovery Point Object Point Objective (PRO) is FALSE?

A. Data center mirroring has the most critical level of RTO.RPO among DC applications.

B. Tier ½ data centers have stricter RTO/PRO requirements than Tire ¾.

C. RTO/PRO defined the acceptable amount of data (in bits) that can be lost after a failure.

D. RTO/PRO define business continually requirements for data center.

正確答案: C

問題4

Suppose there is a 40 Gbit/s signal which has a symbol rate of Gbaud/s. Which modulation format is being used?

A. DP-QPSK

B. BPSK

C. 4QAM

D. QPSK

正確答案: C

最新的Nokia Advanced Optical Network Design - 4A0-255免費考試真題

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