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
None of these
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

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Computer Networking
UDP is:

Connection orientated and reliable
Connectionless and unreliable
Not a part of the TCP/IP suite
None of these
Connection oriented and unreliable

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