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Tuesday, December 17, 2019
ARP - Address Resolution Protocol
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ARP - Address Resolution Protocol
Short for
A
ddress
R
esolution
P
rotocol,
a
network layer
protocol
used to convert an
IP address
into a physical address (called a
DLC address
), such as an
Ethernet
address. A
host
wishing to obtain a physical address
broadcasts
an ARP request onto the TCP/IP network. The host on the network that has the IP address in the request then replies with its physical hardware address.
There is also
Reverse ARP (RARP)
which can be used by a host to discover its IP address. In this case, the host broadcasts its physical address and a RARP server replies with the host's IP address.
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