Computer Networking
RS-232-G

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

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Computer Networking
The application layer of a network

consists of software being run on the computer connected to the network
establishes, maintains, and terminates virtual circuits
defines the user's port into the network
All of these
None of these

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