Web Intro

The Internet is a global network connecting millions of computers, routers, switches, wired & wireless devices and protocols.

Provides a variety of information and communication facilities i.e. websites, search engines, emails, online communities.

More than 190 countries are linked into exchanges of data, news and opinions. According to Internet Live Stats, as of December 30, 2014 there was an estimated 3,037,608,300 Internet users worldwide.



Protocols are set of rules. i.e. HTTP for world wide web, SMTP for sending emails, POP3/IMAP for receiving emails, FTP for file transfers etc.



WWW is world wide web, consists of websites majorly. WWW standards are set by w3c.org, lead by Tim Berners Lee.

Tim Berners Lee, one who created HTML in 1993.



WWW has two main objects in setup:

Web Server, a machine which hosts are websites, popular web servers are Apache and IIS.

Web Clients called Web Browsers, a program use to access, download and view websites.