Computer Networking
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
None of these
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
The probability that one or more errors will be undetected when an error detection scheme is used

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
A WATS arrangement

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

ANSWER DOWNLOAD EXAMIANS APP