Computer Networking
Which of the following does not allow multiple users or devices to share one communications line?

concentrator
controller
doubleplexer
multipplexer
None of these

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Computer Networking
RS-232-G

is an interface between two data circuit terminating equipment as examplified by a local and remote modem
specifies only the mechanical characteristics of an interface by providing a 25-pin connector
requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
None of these

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