Exercise: Networking

Questions for: Networking

In cyclic redundancy checking, the divisor is _____ the CRC.
A:
the same size as
B:
one bit less than
C:
one bit more than
D:
two bits more
Answer: C
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What is the minimum number of wires required for sending data over a serial communications links?
A:
2
B:
1
C:
4
D:
3
Answer: A
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X.21 is
A:
a method of determining which device has access to the transmission medium at any time
B:
a method access control technique for multiple-access transmission media
C:
a very common bit-oriented data link protocol issued by ISO
D:
network access standard for connecting stations to a circuit-switched network
Answer: D
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A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. Differential PCM with 4 bit relative signal value is used. Then how many bits per second are actually sent?
A:
32 Kbps
B:
64 Kbps
C:
8 Kbps
D:
128 Kbps.
Answer: A
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Which of the following frequency ranges is used for AM radio transmission?
A:
Very Low Frequency : 3 kHz to 30 kHz
B:
Medium Frequency : 300 kHz to 3 MHz
C:
High Frequency : 3 MHz to 30 MHz
D:
Very High Frequency : 30 MHz to 300 MHz
Answer: B
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