Internet and Web
CBSE · Class 12 · Informatics Practices
Summary of Internet and Web for CBSE Class 12 Informatics Practices. Key concepts, important points, and chapter overview.
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Overview
Computer networks connect two or more devices so that data and resources can be shared. Networks may be small or large, wired or wireless, and they use devices such as modems, NICs, repeaters, hubs, switches, routers, and gateways. The Internet is the largest WAN, while the World Wide Web is a colle
Key Concepts
A network is a group
A network is a group of two or more similar things or people interconnected with each other. A computer network is an interconnection among two or mor
LAN covers a small geographical area
LAN covers a small geographical area and can extend up to 1 km. Its data rate usually varies from 10 Mbps to 1000 Mbps. MAN covers a city or town, has
Modem stands for MOdulator DEMolulator
Modem stands for MOdulator DEMolulator. It converts digital data into analog signals at the sender end and converts analog signals back into digital d
An Ethernet card
An Ethernet card, also called a Network Interface Card, is a network adaptor used to set up a wired network. It is mounted on the motherboard, has a u
A repeater is an analog device
A repeater is an analog device that regenerates a weakened signal on a cable and puts it back on the cable. Signals can travel about 100 m before weak
Learning Objectives
- Understand the meaning of network and computer network
- Differentiate between LAN, MAN, and WAN
- Identify the functions of common networking devices
- Explain common network topologies and their features
- Distinguish between the Internet and the World Wide Web
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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