الجمعة، 5 يونيو 2015

introduction to ccna



What is a network
 A computer network can be described as a system of interconnected devices that can communicate using some common standard (called protocol). These devices communicate to exchange resources (e.g. files and printers) and services.

Here is an example network consisting of two computers connected together:


What is a protocols ?
In telecommunications, a communication protocol is a system of rules for data exchange within or between computers.

HTTP : (Hypertext Transfer Protocol) is the set of rules for transferring files (text, graphic images, sound, video, and other multimedia files) on the World Wide Web. As soon as a Web user opens their Web browser, the user is indirectly making use of HTTP. HTTP is an application protocol that runs on top of the TCP/IP suite of protocols (the foundation protocols for the Internet).



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