Table of Contents Symmetry of the SIT model
TCP/IP Tutorial and Technical Overview

2.17 Summary

The following chart shows the layered model of the TCP/IP protocol suite and also indicates the application programming interfaces (API) available to the user.

Figure: TCP/IP Layered Model

Note: Remote Procedure Call uses both TCP and UDP. It has been placed upon UDP here since NFS only uses RPC over UDP.

Note: ARP and RARP are only used on local area networks.

The IP/TCP/UDP socket API has been mentioned in Ports and Sockets. The other APIs will be explained in the next chapter:

Table of Contents Routing Protocols