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Computer Science - Networking

Exercise : Networking - Section 2
1.
Which of the following refers to the terms "residual error rate"?
the number of bit errors per twenty four hours of continuous operation on an asynchronous line
The probability that one or more errors will be undetected when an error detection scheme is used
the probability that one or more errors will be detected when an error detection mechanism is used
signal to noise ratio divided by the ratio of energy per bit to noise per hertz
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Which of the following summation operations is performed on the bits to check an error-detecting code?
Codec
Coder-decoder
Checksum
Attenuation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the correct statement about broadband and baseband.
Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel
Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
Baseband refers to local area networks, and broadband refers to wide area networks.
Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed
Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
An error-detecting code inserted as a field in a block of data to be transmitted is known as
Frame check sequence
Error detecting code
Checksum
flow control
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
The cheapest modems can transmit
300 bits per second
1,200 bits per second
2,400 bits per second
4,800 bits per second
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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