Computer Networking
Typewriter terminals can print computer-generated data at a rate of

120 characters per minute
None of these
120 characters per second
10 characters per second
1200 characters per minute

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Computer Networking
A WATS arrangement

is never less expensive than flat-rate service
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
is always less expensive than flat-rate service
None of these

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Computer Networking
Error rate is

a check bit appended to an array of binary digits to make the sum of all the binary digits.
the ratio of the number of data units in error to the total number of data units
None of these
a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
an error-detecting code based on a summation operation performed on the bits to be checked.

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Computer Networking
Demodulation is the process of

combining many low speed channels into one high speed channel
converting analog signals to digital signals
converting digital signals to analog signals
None of these
dividing the high-speed signals into frequency bands

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