Computer Networking
A smart modem can dial, hang up and answer incoming calls automatically. Can you tell who provides the appropriate instruction to the modem for this purpose?

Error detecting protocols
Telecommunications
None of these
Communications software
Link access procedure (LAP)

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Computer Networking
Bulletin board system

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

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