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Ch-2 Networking and Internet
School Revise · Class 11 Information Technology · Chapter 2
Networking and Internet
Code 802, Class 11. Networks connect computers and the internet connects the world. Here we meet network types, devices and how the internet works.
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What this chapter is about
A network joins computers to share data. The internet is the biggest network, using rules called protocols.
1. Network types and devices
A LAN covers a small area, a MAN a city and a WAN a large area. Devices include the hub, switch (join computers), router (join networks) and modem (connect to the internet).
2. Internet and web
The internet is a global network. The World Wide Web is the pages on it, reached by a URL and shown by a browser. Every device has an IP address.
3. Protocols
A protocol is a set of rules for communication. HTTP is for web pages, FTP for file transfer, and TCP/IP is the basic protocol of the internet.
Practise with the interactive
Explore the idea by tapping. The interactive opens right here in the lesson.
Practice set A, multiple choice
1. A network covering a city is a …
MAN.
2. Which device joins two networks?
A router.
3. A unique number for a device is its …
IP address.
4. Which protocol is used for web pages?
HTTP.
Practice set B, short answer
1. Expand LAN, MAN and WAN.
Local, Metropolitan and Wide Area Network.
2. What is a protocol?
A set of rules for communication between devices.
3. What is the difference between a switch and a router?
A switch joins computers in one network; a router joins different networks.
Quick summary
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A network joins computers to share data. A LAN covers a small area, a MAN a city and a WAN a large area; the internet is the biggest WAN. Hubs and switches join computers, a router joins networks and a modem connects to the internet. Every device has an IP address, and protocols such as HTTP, FTP and TCP/IP are the rules of communication. |
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These free Class 11 Information Technology (Code 802) notes explain networking and the internet, LAN MAN and WAN, network devices, IP addresses, the web and protocols HTTP FTP and TCP IP with worked examples and practice, for CBSE students across India and the Gulf including the UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.
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