Computer Networking
The data communication support should include, but is not restricted to

file transfer and transaction processing
file and database access
terminal support, electronic mail and voice grams.
All of these

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Computer Networking
The Internet Control Message Protocol (ICMP)

None of these
All of these
provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem
allows gateways to send error a control messages to other gateways or hosts

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Computer Networking
Which of the following refers to the terms "residual error rate"?

signal to noise ratio divided by the ratio of energy per bit to noise per hertz
The probability that one or more errors will be undetected when an error detection scheme is used
None of these
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 detected when an error detection mechanism is used

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