Exercise: Networking

Questions for: Networking

Which of the following summation operations is performed on the bits to check an error-detecting code?
A:
Codec
B:
Coder-decoder
C:
Checksum
D:
Attenuation
Answer: C
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Which of the following refers to the terms "residual error rate"?
A:
the number of bit errors per twenty four hours of continuous operation on an asynchronous line
B:
The probability that one or more errors will be undetected when an error detection scheme is used
C:
the probability that one or more errors will be detected when an error detection mechanism is used
D:
signal to noise ratio divided by the ratio of energy per bit to noise per hertz
Answer: B
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What device separates a single network into two segments but lets the two segments appear as one to higher protocols?
A:
Switch
B:
Bridge
C:
Gateway
D:
Router
Answer: B
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The _____ houses the switches in token ring.
A:
transceiver
B:
nine-pin connector
C:
MAU
D:
NIC
Answer: C
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The packets switching concept was first proposed
A:
in the late 1980s for the Defense Ministry of US.
B:
in the early 1960s for military communication systems, mainly to handle speech
C:
in the late 1950s for Defense Ministry of US
D:
All of the above
Answer: B
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