Internet protocol:- The Internet Protocol (IP) is the
principal communications protocol in the Internet protocol suite for
relaying datagrams across network boundaries. Its routing function
enables internetworking, and essentially establishes the Internet.
IP has the task of delivering packets from the source host to the
destination host solely based on the IP addresses in the packet headers. For
this purpose, IP defines packet structures that encapsulate the data to be
delivered. It also defines addressing methods that are used to label the
datagram with source and destination information
