Computer Networking
RS-232-G

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
is an interface between two data circuit terminating equipment as examplified by a local and remote modem
None of these
specifies only the mechanical characteristics of an interface by providing a 25-pin connector

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Computer Networking
ARP (Address Resolution Protocol) is

a protocol that handles error and control messages
a TCP/IP high level protocol for transferring files from one machine to another
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol used to monitor computers
None of these

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