Computer Networking
Bulletin board system

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

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Computer Networking
Satellite-Switched Time-Division Multiple Access (SS/TDMA) is

a form of TDMA in which circuit switching is used to dynamically change the channel assignments
the method of determining which device has access to the transmission medium at any time.
a medium access control technique for multiple access transmission media
None of these
All of these

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