Computer Networking
How much power (roughly) a light-emitting diode can couple into an optical fiber?

100 microwatts
10 milliwatts
100 picowatts
None of these
440 microwatts

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Computer Networking
Bulletin board system

converts digital signals to analog signals
None of these
converts analog signals to digital signals
is a public access message system
is a modem capable of accepting commands

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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
is always less expensive than flat-rate service
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
None of these

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