The Internet

Internet stands for: Internetworked Networks
The Internet is a worldwide connection of millions of computers connected to thousands of different networks. These computers "communicate" that is, share, exchange, and transmit data to another computer on the same or another network.

Nobody owns or controls the Internet. It is a global information system similar in some respects to telephone networks that allow anybody to call any other number anytime, anywhere.

a. Internet Services

The Internet has several component applications. These include:
1. Telnet - terminal emulation - Allows a user on one computer to log onto a remote computer and run software on that remote computer as if it were on the user's local computer

2. FTP – File Transfer Protocol - Allows users to upload and download files from other computers

3. EDI – Electronic Data Interchange - Allows for electronic transfer of data between companies over the Internet

4. IRC – Internet Relay Chat - Allows people connected over the Internet to participate in discussions. It allows people to converse in "real time," people may actually see you type your questions and responses.

5. Email – Electronic Mail, allows people to send and receive electronic messages.

6. Newsgroup - This is the Internet equivalent of a discussion group or an electronic bulletin board. There are newsgroups for every conceivable topic and more, from educational technology and Brazil culture to stamp collecting and mountaineering. Computer newsgroups start with comp as in comp.apps.spreadsheets. while recreational newsgroups start with rec as in rec.arts.cinema. The others are alt for alternate, soc for social, sci for science, and news for news.

7. World Wide Web is a vast, ever-expanding collection of online documents and information formatted in Hypertext Markup Language (HTML) distributed over the Internet. It is a software application that uses the Internet.

b. Internet address domain

Each computer on the Internet is called an Internet host or a host machine. Each host machine has a special Internet protocol address (IP address) that uniquely identifies that computer. IP addresses were never designed to be seen by human eyes. They are an address that is interpreted by a computer. An example of an IP address is:

Since numbers are easy for a computer to work with but difficult for humans, most host machines have a Domain Name Service (DNS) address. For instance, the domain name service address of the IP address listed above is:
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