This course is designed for novice programmers, entry level engineers and newcomers to Web Development who want to learn or revise the basic concepts related to computer networks.

The course is intended to be a refresher that can be completed in 10 hours.

Introduction to Computer Networks (ICN)

<ul><li>A WAN (wide area network), in&nbsp;comparison&nbsp;to LAN, as explained in the earlier section is not bounded by a geographical location.</li><li>A WAN&nbsp;connects several Local Area&nbsp;Networks&nbsp;to provide services to a larger set of users.&nbsp; </li><ul><li>WAN may be limited to an organization only or accessible to the public and shared user networks.</li></ul><li>A computer network of an organization that has offices in several countries can be an example of a WAN. This WAN helps connect the LAN of each of these offices.</li></ul><ul><li>A wide area network may be privately owned or rented, but the term often means inclusion of public (shared user) networks. </li><li>The WAN is usually high speed and the services it provides are relatively expensive.</li><li>Internet is an example of a worldwide public WAN. We will discuss more about Internet in the next section</li></ul>Metropolitan Area Network (MAN) <ul><li>A computer network which is larger than LAN but smaller than WAN in terms of geography is called a metropolitan area network (MAN).</li></ul>

TCP

TCP/IP Protocols

UDP

TCP vs UDP

Networks

What happens when you type a URL in the browser to access a website ?

Internet Protocol IPv4

Internet Protocol IPv6

HTTP

WAN