The Internet is 40 years old!

It may sound surprising, but the Internet is actually 40 years old today. Len Kleinrock, a computer scientist and his team at UCLA began experiments, laying the foundation of what later became the Internet.

On September 2, 1969, two computers send out meaningless test data at Kleinrock's lab at the University of California, Los Angeles. In the present day, it is well nigh impossible to imagine a world without the world wide web.

And which are the countries with the best Internet connection speed? No, it's not the United States.

South Korea, Singapore, the Netherlands, Denmark and Taiwan are the top five countries listed in terms of access to high-speed Internet.

The United States ranks 28th in the world in average Internet connection speed according to a report by the Communications Workers of America (CWA).

The average download speed in South Korea is 20.4 megabits per second (mbps), four times faster than the US average of 5.1 mbps.

The Advanced Research Projects Agency Network (ARPANET) created by the United States Department of Defense during the Cold War, was the world's first operational packet switching network, and the predecessor of the global Internet.

ARPANET became the technical core of what later turned to be the world's favourite 'Internet'.

The Internet and Transmission Control Protocols were initially developed in 1973 by American computer scientist Vinton Cerf as part of a project work of the Defense Advanced Research Projects Agency (ARPA) and directed by American engineer Robert Kahn.

Vinton G. Cerf, known as the 'father of Internet', is now the vice president and chief internet evangelist for Google.

He is responsible for identifying new enabling technologies and applications on the Internet and other platforms for the company.

The birth of www

The Internet began as a computer network of ARPA (ARPAnet) that linked computer networks at several universities and research laboratories in the United States.

The design of the Internet was done in 1973 and published in 1974.  The roll out of Internet took place in 1983, after ten years of research and hard work.

Later, the domain names system was proposed. This was followed by introduction of suffixes .com, .gov and .edu in 1984.

The world wide web (www) was developed in 1989 by English computer scientist Timothy Berners-Lee.

He came up with the idea of a project based on 'hypertext' while working at CERN, the European Organization for Particle Physics Research.

Berners-Lee's aim was to enable sharing and updating of information among researchers.

He joined hands with Robert Cailliau to build a prototype system named Enquire. This programme formed the basis for the World Wide Web.

By December 1990, WorldWideWeb became the first successful demonstration of Web clients and servers working on the Internet.

The first Web site built by Berners-Lee at info.cern.ch went live on August 6, 1991. Berners-Lee also made his site the world's first Web directory, adding a list of other sites.

The most remarkable fact about Berners is that he gave it away, without any patent and royalties.

He wrote the first server client programme, the first version of the document formatting language HTML (hyper text mark-up language), and initiated the specifications for URLs (universal resource locators, HTTP (hyper text transfer protocol), and HTML.

It used a system of hyperlinks (links) using a web browser. The earliest web browsers were Mosaic, Netscape Navigator and Microsoft's Internet Explorer.

In 1993, Marc Andreessen and his colleagues at the University of Illinois created Mosaic, the first web browser that combined graphics and text on a single page.

The killer application of the Internet was is the e-mail. However, work on creating e-mail started much before the Internet. The Internet was a crucial tool in making the process faster.

E-mail started in 1965 for multiple users of a time-sharing mainframe computer to communicate. MIT first demonstrated the Compatible Time-Sharing System (CTSS) in 1961.

It allowed multiple users to log into the IBM 7094 from remote dial-up terminals, and to store files online on disk.

This new ability encouraged users to share information in new ways. E-mail started in 1965 for users of a time-sharing mainframe computer to communicate.

The ARPANET computer network helped in the evolution of e-mail.In 1971, Ray Tomlinson created what later became the standard Internet e-mail address format, using the @ sign to separate user names from host names.

The Internet has hooked billions of people in its web. According to the latest figures, the number of internet users in the world is whopping -- 1,596,270,108.

The number of internet users is expected to double over the next few years. According to InternetWorldStats (IWS), China tops in the number of Internet users.

China has 298,000,000 users, followed by US with 227,190,9893 users. Japan comes next at the third place with 94,000,000 users. India comes next with 81,000,000 users. Brazil takes the fifth place with 67,510,400 users.

After forty years of existence, the Internet is running short of space. The internet is facing an IP address exhaustion, a fall in the Internet Protocol version 4 (IPv4) addresses due to the dizzying pace of the Internet's growth. Internet Protocol version 4 provides about 4.29 billion addresses.

IPv4 addresses are likely to run out by 2011. This will affect the connectivity of the internet and curb its further growth.

The answer to this crisis is Internet Protocol version 6 (IPv6) which will provide an unlimited number of addresses. It will also enable efficient rollout of broadband, Internet-connected mobile phones and sensor networks.

Many existing networks would need to be upgraded to accommodate the new protocol to growth further and make better and faster technological advances in a medium that unites the world.