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>Ping is a TCP/IP protocol used to determine the remote connectivity. </li><li>PING Stands for Packet InterNet Gopher.&nbsp;</li><li>Ping is basically a method to see if a server or a client is present on a network.</li></ul>How does PING work <ul><ul><li>The ping command first sends an echo request packet to an address, then waits for a reply.&nbsp;</li><ul><li>The ping is successful only if:</li><ul><ul><li>The echo request gets to the destination, and</li><li>The destination is able to respond with an echo reply back to the source within a predetermined time called a timeout.&nbsp;</li><ul><li>The default value of this timeout is two seconds on Cisco routers.</li></ul></ul></ul></ul></ul></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

PING