Question 1

Which of the following statements about Bit Error Rate (BER) is correct?

Options :

A : BER is the ratio of redundant bits to correct bits.

B : BER is measured at both the transmitted and receiving ends.

C : BER can be measured before after the FEC decoding.

D : BER can be accurately measured in a short period of time , for any rate.

Answer: B

Question 2

Which of the following about the Optical channel Transport Unit (OUT0 in ONT network is correct?

Options :

A : OUT refer to the section between two multiplexers passing through one or more amplifiers.

B : OUT refers to the section between two amplifiers.

C : OUT enables the multiplexing of OCH connections.

D : OUT enables FEC processing.

Answer: A

Question 3

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

Options :

A : RTO/PRO define business continually requirements for data center.

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

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

D : Tier data centers have stricter RTO/PRO requirements than Tire .

Answer: B

Question 4

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?

Options :

A :

Other-Image-4db137982-95ea-4bc7-bcd4-5521fcf93e52

B :

Other-Image-6db137982-95ea-4bc7-bcd4-5521fcf93e52

C :

Other-Image-8db137982-95ea-4bc7-bcd4-5521fcf93e52

D :

Other-Image-10db137982-95ea-4bc7-bcd4-5521fcf93e52

Answer: B

Free 4A0-255 Mock Exam – Practice Online Confidently

Buying Options: