Computer Networking
The ________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.

Connection establish.
Connection release failure probability.
Residual Error Rate.
Transfer Failure Probability.

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Computer Networking
A front-end processor is

a processor in a large-scale computer that executes operating system instructions
None of these
a minicomputer that relieves main-frame computers at a computer centre of communications control functions
a user computer system
preliminary processor of batch jobs.

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