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Unformatted text preview: rovided by the Internet to its users. These are described below. Electronic Mail The electronic mail service (known as e-mail in short) allows an Internet user to send a mail (message) to another Internet user in any part of the world in a nearreal-time manner. The message may not reach its destination immediately, but may take anywhere from few seconds to several minutes, because it must be passed from one network to another until it reaches its destination. E-mail service has many similarities with the postal mail service that all of us are familiar with. All Internet users have an e-mail address, just like all of us have a postal address. Each Internet user has a logical mail box just like each one of us has a mail box in our house. When sending a mail to another user, the sender specifies the e-mail address of the receiver just as we write the postal address of the receiver in the postal mail system. The e-mail service delivers an already sent mail into the receiver's mail box. The receiver extracts the mail from the mail box and reads it at his/her own convenient time just like in a postal mail system. After reading the message, the receiver can save it, delete it, pass it on to someone else, or respond by sending another message back. Messages in e-mail service can contain not only text documents but also image, audio and video data. The only restriction is that the data to be sent must be digitized, that is, converted to a computer-readable format. With e-mail service, the Internet has proved to be a rapid and productive communication tool for millions of users. As compared to paper mail, telephone, and fax, e-mail is preferred by many because of its following advantages: 1. It is faster than paper mail. 2. Unlike the telephone, the persons communicating with each other need not be available at the same time. 3. Unlike fax documents, e-mail documents can be stored in a computer and be easily edited using editing programs. File Transfer Protocol The File Transfer Protocol service (known as FTP in s...
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This document was uploaded on 04/07/2014.

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