SONET - Computer Networks Questions and Answers
1.
SONET stands for
A.)
synchronous optical network
B.)
synchronous operational network
C.)
stream optical network
D.)
shell operational network
Answer: Option 'A'
synchronous optical network
2.
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 these
Answer: Option 'B'
across a physical line
3.
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 these
Answer: Option 'A'
51.84 Mbps
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 these
Answer: Option 'C'
physical layer
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: Option 'C'
8000 frames
6.
Which one of the following is not true about SONET?
A.)
multiplexing is synchronous TDM
B.)
all clocks in the network are locked to a master clock
C.)
frames of lower rate can be synchronously time-division multiplexed into a higher-rate frame
D.)
none of these
Answer: Option 'D'
none of these
7.
A linear SONET network can be
A.)
point-to-point
B.)
multi-point
C.)
both (a) and (b)
D.)
none of these
Answer: Option 'C'
both (a) and (b)
8.
Automatic protection switching in linear network is defined at the
A.)
line layer
B.)
section layer
C.)
photonic layer
D.)
path layer
Answer: Option 'A'
line layer
9.
A unidirectional path switching ring is a network with
A.)
one ring
B.)
two rings
C.)
three rings
D.)
four rings
Answer: Option 'B'
One ring is used as the working ring and other as the protection ring.
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10.
What is SDH?
A.)
SDH is similar standard to SONET developed by ITU-T
B.)
synchronous digital hierarchy
C.)
both (a) and (b)
D.)
none of these
Answer: Option 'C'
both (a) and (b)
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