Page 347 - IT 402 v2.0 class 10
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Internet is a global network of networks connecting millions of computing devices worldwide. Today people
and business around the world are using the resources of Internet to retrieve information, communicate and
conduct business and access to vast variety of services and resources online.
World Wide Web (WWW)
The ‘World Wide Web’ is a framework for accessing the documents that are spread over millions of computing
devices over the Internet.
was introduced in by the nglish hysicist Sir im erners ee. It evolved with the purpose of
creating a simple way to provide access to different types of documents on the network without searching
through index or directories of files or without copying documents from one computer to another on network.
herefore a way to link documents that were stored in different locations in different computers on the
network but under a single frame was established and thus, WWW evolved.
WWW is a wide-spread information retrieval service which enables to access, gather, store and display
information in form of text, photographs, graphics, audio, video, etc., that have been uploaded on the
Internet. It allows the multimedia and hypertext files to be displayed and linked on the Internet.
Features of WWW
Following are some of the features of WWW:
User Friendly: WWW resources are compatible and can be used easily with the help of web browsers.
Data Sharing: hrough users can send text files spreadsheets documents presentations audio
files video files etc. to others.
Multimedia documents: Multimedia documents are the information in the form of an audio, video,
graphics, animations and text which are viewed in the web pages. WWW allows and supports the Internet
users to create, link or display multimedia web pages.
Interactive: WWW provides a graphical interface. It supports and enables convenient interaction between
the users and the server through hyperlinks and input boxes like radio buttons, check boxes, text boxes,
etc.
Accessibility: WWW is accessible by anyone irrespective of location, community, nationality, profession,
etc. A user just needs computer, modem and Internet connection to use its resources.
Caching: If a user revisits the same web page in a short interval, it may not be need to recall the data of
the web page from the source web server. Caching enables to store data temporarily in the memory. It
enables to revisit or re-browse the same website quickly while operating on the same computer before
switching it off. helps to reduce the uantum of transferring web tra c on the Internet by caching.
To Access Internet
One needs to get an Internet connection to connect with its resources. Internet connection is provided by
Internet Service roviders IS such as harat Sanchar Nigam imited SN irtel eliance io etc.
The connection to the Internet depends on how we plan to use the Internet. Since our main focus is on
Ns here we shall focus on dial-up and IS N Integrated Services igital Networks connections. arge
companies may have their own dedicated high-bandwidth connections, which are more complex than the
one being discussed here.
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