Nokia 4A0-255 問題集

質問 1：
Consider the exhibit that shows a network with a full mesh fiber structure. Link weights indicate the cost.
Future services can be requested between any node pair.
Which of the following topology represents a minimum cost design (minimum overall fiber cost) where link failure survivability is ensured?
A)

B)

C)

D)

A. Option A
B. Option C
C. Option D
D. Option B
正解：D

質問 2：
Consider the exhibit shows the standard 8-step network design process. Suppose that you have used this process to design a Green filed network, which has been commissioned and is in operation. The customer now requests an extension to the network to accommodate more steps and traffic. Which steps are not required when designing such an extension?

A. The steps to befollowed depended on the requirement of the network extension.
B. Step 2(analyze Traffic Demand and Step 4 ( Define Network Topology)
C. Step2 (Analyze Available) and Step 8 (Analyze Cost).
D. Step (Define Network Architecture ) and Step 5( Evaluate Traffic Demandon Architecture)
正解：C

質問 3：
Which of the following best describes Flexgrid?
A. Flexgrid is based on flexible amplification stages
B. Flexgrid uses flexible guardband that can take any spacing.
C. Flexgrid allows channel bandwidth central frequencies and guardband to take any value in the spectrum range.
D. Flexgrid is defined on a frequency grid spacing based on ,multiples of 12.5 GHz.
正解：A

質問 4：
Which of the following best describes self-phase modulation?
A. It is a phase shift suffered by an optical signal caused by its power intensity.
B. It is a type of modulation format exploiting the phase to carry information.
C. It is s type of impairment that can be compensated usingDCMs
D. It is a type of impairment cause by spectrally adjacent channels.
正解：D