CBSE Computer Applications Class X

Unit 1: Networking (15) 

• Services available on the internet: information retrieval, locating 
sites using search engines and finding people on the internet.


3: Services available on the internet

A:- Internet: Internet is a global system to inter connect computer network. We can
connect our computer to another computer anywhere either in India or abroad. Internet
is a wide area network which allow a user to access data of information, stored on web
and it provide number of facilities like email, web, chat, social network, online
registration etc.

B:- History of Internet: It began in 1970’s and 1980’s. The Internet as we know it
today began as the ARPANET (Advanced Research Projects Agency Network) built
by a division of the Department of Defence. Many local area networks connected to
the ARPANET with TCP/IP. TCP-Transmission Control Protocol/IP-Internet
Protocol was developed in 1974.

C:- Networking: A group of two almost computer inter connected by the telephone
lines co axial cabal, satellite, links, radio, microwave etc. Some other combination
techniques are called networking.

D:- Domain Name System: The domain name system (DNS) is a hierarchical
distributed naming system for computers, services, or any resource connected to the
private network. It associates information with domain names assigned to each of the
participating entities. Most prominently, it translates easily memorized domain names
to the numerical IP addresses needed for the purpose of locating computer
services and devices worldwide. By providing a worldwide, distributed keyword-
based redirection service, the Domain Name System is an essential component of the
functionality of the Internet.

E:- Internet Protocols: The Internet Protocol (IP) is the principal communications
protocol in the Internet protocol suite for relaying datagram across network
boundaries. Its routing function enables internetworking, and essentially establishes
the Internet.