A Brief Look at Network Protocols


For a specific example of a protocol structure see How Does TCP/IP Work? (local copy) in the TCP/IP Tutorial.

TCP/IP is based on the "catenet model".  (This is  described in more detail in IEN 48.)  This model assumes that there are a large numberof independent networks connected together  by  gateways.     The user should be able to access computers or other resources on any of these networks.   Datagrams  will  often  pass  through a dozen different networks   before getting  to  their  final  destination.  The routing needed to accomplish this should be completely invisible to  the user.   As far as  the  user  is concerned,  all he needs to know in order to access another system is an "Internet address". (Source)
TCP/IP Headers
Configuration for a TCP/IP example
TCP/IP: Message path 1
TCP/IP: Message path 2
TCP/IP: Message path 3


TCP/IP Tutorial and Technical Overview:  an authoritative (but some dated) discussion of internet protocols and architectures.

This page was prepared and is maintained by R. Victor Jones
Comments to: jones@deas.harvard.edu.

Last updated January 5, 2000