TCP/IP PROTOCOL SUITE

Topics discussed in this section:

• Physical and Data Link Layers
• Network Layer
• Transport Layer
• Application Layer

TCP/IP PROTOCOL SUITE
The layers in the TCP/IP protocol suite do not exactly match those in the OSI model. The original TCP/IP protocol suite was defined as having four layers: host-tonetwork, internet, transport, and application. However, when TCP/IP is compared to OSI, we can say that the TCP/IP protocol suite is made of five layers: physical, data link, network, transport, and application.