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 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

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Computer Networking
You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?

The host has an invalid MAC address.
The switch port the host is connected to is not configured to the correct VLAN membership.
The VTP configuration on the switch is not updated for the new host.
The router is not configured for the new host.

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Computer Networking
The Internet Control Message Protocol (ICMP)

All of these
None of these
allows gateways to send error a control messages to other gateways or hosts
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

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