Computer Networks Questions & Answers – SONET MCQ أسئله شبكات بالأجابات الجزء الثاني و السبعون

Computer Networks Questions & Answers – SONET

1. SONET stands for
a) synchronous optical network
b) synchronous operational network
c) stream optical network
d) shell operational network

Answer: a
Explanation: None.

2. In SONET, STS-1 level of electrical signalling has the data rate of
a) 51.84 Mbps
b) 155.52 Mbps
c) 466.56 Mbps
d) none of the mentioned

Answer: a
Explanation: None.

3. The path layer of SONET is responsible for the movement of a signal
a) from its optical source to its optical destination
b) across a physical line
c) across a physical section
d) none of the mentioned

Answer: b
Explanation: None.

4. The photonic layer of the SONET is similar to the __________ of OSI model.
a) network layer
b) data link layer
c) physical layer
d) none of the mentioned

Answer: c
Explanation: None.

5. In SONET, each synchronous transfer signal STS-n is composed of
a) 2000 frames
b) 4000 frames
c) 8000 frames
d) 16000 frames

Answer: c
Explanation: None.

6. Which one of the following is not true about SONET?
a) frames of lower rate can be synchronously time-division multiplexed into a higher-rate frame
b) multiplexing is synchronous TDM
c) all clocks in the network are locked to a master clock
d) none of the mentioned

Answer: d
Explanation: None.

7. A linear SONET network can be
a) point-to-point
b) multi-point
c) both point-to-point and multi-point
d) none of the mentioned

Answer: c
Explanation: None.

8. Automatic protection switching in linear network is defined at the
a) line layer
b) section layer
c) photonic layer
d) path layer

Answer: a
Explanation: None.

9. A unidirectional path switching ring is a network with
a) one ring
b) two rings
c) three rings
d) four rings

Answer: b
Explanation: One ring is used as the working ring and other as the protection ring.

10. What is SDH?
a) sdh is similar standard to SONET developed by ITU-T
b) synchronous digital hierarchy
c) both sdh is similar standard to SONET developed by ITU-T and synchronous digital hierarchy
d) none of the mentioned

Answer: c
Explanation: None

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