Computer Networks
Chhattisgarh Board · Class 12 · Computer Science
Summary of Computer Networks for Chhattisgarh Board Class 12 Computer Science. Key concepts, important points, and chapter overview.
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Computer networks are interconnections among two or more computers or computing devices that allow data and resources to be shared. A network may be small, such as devices connected in a room, or very large, such as the Internet. Networks use wired or wireless media, and devices in them are identifi
Key Concepts
A network is a group
A network is a group of two or more similar things or people interconnected with each other. In data communication, a node is any device in the networ
ARPANET was a 1960s U
ARPANET was a 1960s U.S. Department of Defence research project connecting academic and research institutions. The first message was sent between UCLA
PAN
PAN, LAN, MAN, and WAN are classified by geographical area. PAN covers about 10 metres, LAN can extend up to 1 km, MAN can extend up to 30-40 km, and
Modem stands for MOdulator DEModulator
Modem stands for MOdulator DEModulator. It converts digital bits into analog signals at the sender’s end and converts analog signals back into digital
An Ethernet card
An Ethernet card, also called a Network Interface Card, is a network adapter used to set up a wired network. It is mounted on the motherboard, support
Learning Objectives
- Understand the meaning and use of computer networks
- Recognise the evolution of networking from ARPANET to the modern Internet
- Differentiate between PAN, LAN, MAN, and WAN
- Identify the function of modem, NIC, RJ45, repeater, hub, switch, router, and gateway
- Compare mesh, ring, bus, star, and tree or hybrid topologies
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