In 1969, the US Department of Defense started a project to allow researchers and military personnel to communicate with each other in an emergency. The project was called ARPAnet and it is the foundation of the Internet.
Throughout the 1970’s, what would later become the Internet was developed. While mostly military personnel and scientists used it in its early days, the advent of the World Wide Web in the early 1990’s changed all that.
Today, the Internet is not owned or operated by any one entity. This worldwide computer network allows people to communicate and exchange information in new ways.
What is the Internet?
The Internet is the largest computer network in the world, connecting millions of computers. A network is a group of two or more computer systems linked together.
How the computer connected to the internet ?
For the Internet connection, there are three things you need: an Internet service, a modem, and a web browser.
What are Clients and servers?
In general, all of the machines on the Internet can be categorized as two types:
Those machines that provide services (like Web servers or FTP servers) to other machines are servers.
The machines that are used to connect to those services are clients.
If you connect to Yahoo! at www.yahoo.com to read a page, Yahoo! is providing a machine , for use on the Internet, to service your request. Yahoo! is providing a server.
Your machine, on the other hand, is probably providing no services to anyone else on the Internet. Therefore, it is a user machine, also known as a client.
A single may machine act as server and client.