5.3.1 Concept of Internet
ARPANET (Advanced Research Project Agency Networks), the originator of Internet emerged in 1957 from the U.S. Department of Defence .Since its beginning in 1969, the Internet has grown from four host computer systems to tens of millions. Although nobody owns the Internet, but it is monitored and maintained indifferent ways. The Internet Society,a non-profit group established in 1992, oversees the formation of the policies and protocols that define how we use and interact with the Internet.
A computer on Internet can be addressed using a Internet protocol (IP) address and can also be located using Domain Name Service (DNS). The IP address consists of Address of the Network and Address of the computer within the Network. A typical IP address look like this.
184.108.40.206.When the Internet is its infancy, it consisted of a small number of computers hooked together with modems and telephone lines. You could only make connections by providing the IP address of the computer you wanted to establish a link with.