History of internet

Internet is a vast network connecting millions of computers. Through internet, the first long distance message was sent to launch the ARPANET on October 29, 1969.
Network is a group of two or more computers linked together. Various types of network include LAN, MAN and WAN. Network device is a component that is used to connect computers so that they can share resources. Modem is a networking device, which converts data from digital computer signals to analog signals.

Tim Berners-Lee invented WWW in 1989. Web pages make the WWW. Web site is a collection of web pages linked together to form a global web of information. Each website has a unique address. This address is called URL. Web server is a computer that hosts a website over the internet. Search engine is a program that searches through a database of web pages for particular information. FTP is a network protocol used to transfer computer files from one host to another host over the internet. FTP works on the client/server principle. Protocol is a standard set of rules for communication. There are two types of e-mail clients: web-based client and stand alone e-mail client. A web-based client appears in a web page, while a stand-alone e-mail client runs on our own computer. The mail client and mail server can exchange information with each other using a variety of protocols. The protocols used with email include IMAP (Internet Message Access Protocol), POP3 (Post Office Protocol 3), SMTP (Simple Mail Transfer Protocol) and HTTP (Hyper Text Transfer Protocol).

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  • Q1

    What is a Server?

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    Answer:

    Those machines that provide services (like Web servers or FTP servers) to other machines are servers.

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  • Q2

    What do you understand by URL?

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    Answer:

    The full form of URL is Uniform Resource Locator. A URL refers to an address on the internet. Billions of documents/ multimedia files can be accessed on Internet through their URLs.

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  • Q3

    What is a hyperlink?

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    Answer:

    The link between Web pages is known as hyperlink. It is the link that leads from one document to another.

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  • Q4

    Explain ARPANET?

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    Answer:

    Advanced Research Projects NETwork, is a network established in 1969 to connect computers at different universities and U.S.Defense.

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  • Q5

    What is a network?

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    Answer:

    Network is a group of devices linked to one another, e.g., network of trains, cable network.

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