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• Wireless connection: You can also connect your computer to the Internet using wireless technology as shown
in figure. Laptops need a wireless Internet card to connect to a modem with using any cables.
Modem
Desktop Laptop Modem
Wired connection Wireless connection
Bandwidth
Bandwidth is the amount of data that can be transmitted over a network in a certain amount of time. To understand
Let us take the example of a pipe, the amount of water flowing through a pipe depends on its thickness. Similarly,
the amount of data that your network can receive or send depends on its bandwidth. In case of digital devices,
the bandwidth is usually expressed in bits per second (bps) or bytes per second and in case of analog devices, the
bandwidth is expressed in cycles per second, or Hertz (Hz).
Data transfer speed over the networks (including the internet) is calculated in terms of bits per second.
1 Kbps (kilo bits per second) = 1000 bits per second
1 Mbps (mega bits per second) = 1000 kilo bits per second
1 Gbps (giga bits per second) = 1000 mega bits per second
World Wide Web
The World Wide Web (WWW) or simply the Web is a huge collection of information. It is a vast network of linked
hypertext files, stored on computers throughout the world, that can provide a computer user with information
on a huge variety of subjects. Thus, it serves as a platform through which users can use or share information. It is
made up of
• A web page
• A web browser
• A system to transfer information between the web browser and the web pages
Web page
A web page is a document present on a computer that is connected to the Internet. There are hundreds of web
pages. Each web page has a unique address/location like the address of a house. We can use the address to see a
particular web page. To view a web page you need a web browser on your computer.
Web browser
A web browser (commonly referred to as a browser) is a software application for using and sharing information on
the World Wide Web. The most popular web browsers that are used today are
Chrome Firefox Opera Safari Microsoft Edge
ICT Skills-I 101

