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

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Computer Networking
You type the following command into the router and receive the following output:Router#show serial 0/0 ^% Invalid input detected at '^' marker.Why was this error message displayed?

You cannot have a space between serial and 0/0.
You need to be in privileged mode.
The router does not have a serial0/0 interface.
Part of the command is missing.

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Computer Networking
Bus is

None of these
a continuous frequency capable of being modulated or impressed with a second signal
one or more conductors that some as a common connection for a related group of devices
the condition when two or more stations attempt to use the same channel at the same time
a collection of interconnected functional units that provides a data communications service among stations attached to the network

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