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

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
the number of bit errors per twenty four hours of continuous operation on an asynchronous line

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Computer Networking
Which statement describes a spanning-tree network that has converged?

All switch and bridge ports are in the forwarding state.
All switch and bridge ports are either blocking or looping.
All switch and bridge ports are assigned as either root or designated ports.
All switch and bridge ports are in either the forwarding or blocking state.

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