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)

Here is a list of common TCP/IP protocols and their respective port numbers with which they are identified.<ul><li>Telnet is used for remote login into the devices. </li><li>SMTP is the protocol used for email communication. </li><li>HTTP is the protocol used for world wide web communication, discussed later </li><li>FTP&nbsp;is the protocol used to transfer computer files between a server and client over the network. </li><li>DNS&nbsp;is the protocol used for hierarchial naming system for computers, services and resources on the network.</li><li>HTTPS&nbsp;is the protocol used for secure world wide web communication.</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

Common Protocols and port Numbers