The TCP/IP Protocol Architecture

TCP/IP defines a large collection of protocols that allow computers to communicate. Table 1.1 outlines the protocols and the TCP/IP architectural layer to which they belong. TCP/IP defines the details of each of these protocols in Requests For Comments (RFC) documents. By implementing the required protocols defined in TCP/IP RFCs, a computer that implements the standard networking protocols defined by TCP/IP can communicate with other computers that also use the TCP/IP standards.

TCP/IP Architecture Layer    Protocols

Application           -               HTTP, POP3, SMTP
Transport              -              TCP, UDP
Inter network        -               IP
Network interface -              Ethernet, Frame Relay