Internet is a cooperative interconnection of many single-entity networks such as Single Corporation, government agency, telecommunication networks. So Internet is called ‘Network of networks’. It overcomes the handicaps such as time differences, cultural variations.




E-Mail(Electronic Mail)  is a very speed and inexpensive alternative to the conventional postal services. E-Mail is transfer from one computer to another along the network. Each computer reads the e-mail address and routes it to another computer until it eventually reaches it destination.

Every person has a unique e-mail address. E-Mail addresses are in the form of This email address is being protected from spambots. You need JavaScript enabled to view it.. For example This email address is being protected from spambots. You need JavaScript enabled to view it..




Many protocols used in networking. Protocols defines the behavior of a hardware connection. A protocol is a convention or standard that controls or enables the connection, communication, and data transfer between computers. Some important protocols are HTTP, SMTP, POP3, TCP/IP.


HTTP: http gives a reliable transport. Resources used in http are identified by URI(Uniform Resource Identifiers) or URL (Uniform Resource Locators).


SMTP: It is the popular Internet protocol. It is used between the Internet hosts to transfer the e-mails from one computer to other. It’s destination for delivery is user’s e-mail box.

POP3: This protocol makes it possible for the TCP/IP dial-up account users to read, prepare and organize the emails in off-line.


TCP/IP:  There are two original components of the suite. One is TCP(Transmission Control Protocol) and the another one is IP(Internet Protocol). The entire suite is TCP/IP. IP handles lower level transmissions from computer to computer whereas TCP handles higher ends.

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