LECTURE 2

Section 2

Protocols

A protocol is a set of rules for communicating between two parties.
A protocol is needed for the transfer of files over different types of networks to remain constant
The standard protocol was introduced by the International Organization for Standardisation (ISO)
One such protocol is TCP/IP
IP is connectionless
It is unaware of the physical connection between destination and source.

Section 3

Client/Server

Client

Remote machine
Initiates the connection by sending a request
Requests information from the server
Information is sent back and forth
closes the connection
Generally the information consumer

Server

• Waits to acept incoming calls
• Handles multiple incoming signals simultaneously
• Some servers use preforking, which is done in anticipation of requests
• For web servers, they are usually stand-alone
• Generally reffered to as the information provider.

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