3.7 NETWORK APPLICATIONS

There are wide varieties of computer application in today’s world, without computer

networking it is difficult to imagine the world. Few of these applications are described

below:

Persontoperson communication: Realtime systems, such as videoconferencing and virtual meeting  environments over the network or internet, allow remote users to communicate with no delay, possibly seeing and hearing each others as well.

Email : Email is simply the shortened form of electronic mail, a protocol for receiving, sending and storing electronic messages. Email has gained popularity with the spread of the computer network. In many cases, email has become the preferred method of communication. Emails are accessed using through email client software like Outlook, In addition to email client softwares, Webmail has also become very popular. Most email service providers offer this as an additional benefit, where the user can access their mailbox over the Internet. Some email services are specifically designed using the World Wide Web as its primary interface. Sites like Yahoo! Mail, Google Mail and Hotmail have become very popular, as they offer individuals a chance to open an email account at no charge.

Interactive entertainment: Computer network is extensively being used in entertainment industry. Services like Video on demand in which the user can select any movie or TV program ever made, in any country, and have it displayed on his screen instantly. Other applications include Live and interactive TV in which audience may participate in quiz shows, multiplayer realtime games flight simulators, etc.

FTP: File Transfer Protocol (FTP) is a network protocol used to exchange and manipulate files over a computer network using Transmission Control protocol Network. FTP is commonly used to transfer Web page files from their creator to the computer that acts as their server for everyone on the Internet. It's also commonly used to download programs and other files to your computer from other servers

Telnet: A terminal emulation program for TCP/IP networks such as the Internet. Telnet is a protocol that allows you to connect to remote computers (called hosts) over a computer network using TCP/IP. You can use software called telnet client on the computer to make a connection to a telnet server (i.e., the remote host). Once your telnet client establishes a connection to the remote host, your client becomes a virtual terminal, allowing you to communicate with the remote host from your computer. In most cases, you'll need to log into the remote host, which requires that you have an account on that system. Occasionally, you can log in as guest or public without having an account.

Marketing and sales: Computer networks are used extensively in both marketing and sales  organizations. Marketing professionals use them to collect, exchange, and analyze data related to customer needs and product development cycles. Sales application includes teleshopping, and onlinereservation services for hotels, airlines and so on.

Financial services: Today's financial services are totally depended on computer networks. Application includes credit history searches, foreign exchange and investment services, and electronic fund transfer, which allow user to transfer money without going into a bank (an automated teller machine is an example of electronic fund transfer, automatic paycheck is another).

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