IP address
IP address is a 32-bit
number that identifies each unique sender or receiver of information that is sent in
packets; it is written as four octets separated by periods (dotted-decimal format). An IP
address has two parts: the identifier of a particular network and an identifier of the
particular device (which can be a server or a workstation) within that network. You may add
an optional sub-network identifier. Only the network part of the address is looked at
between the routers that move packets from one point to another along the network. Although
you can have a static IP address, many IP addresses are assigned dynamically from a pool.
Many corporate networks and online services economize on the number of IP addresses they use
by sharing a pool of IP addresses among a large number of users. (The format of the IP
address is slightly changed in IPv6.)
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