1. Introduction
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TCP/IP protocol is the low-level networking software most
commonly used with UNIX.
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Components of TCP/IP
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Internet protocol (IP), which transports raw data from one
machine to another.
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Internet Control Message Protocol (ICMP), which provides
several low-level support for IP, including error messages, routing assistance,
and echo requests.
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Address Resolution Protocol (ARP), which translates logical
network addresses to hardware addresses.
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User Datagram Protocol (UDP) and Transmission Control Protocol
(TCP), which send data from one program to another using IP. UDP provides
unverified transportation for individual messages, while TCP is reliable
and connection-based.