Class 12 Computer Science — Chapter 10: Computer Networks

Chapter 10: Computer Networks is a chapter in Class 12 Computer Science (NCERT), part of the CBSE NCERT curriculum followed by over 25 million students across India. This chapter covers 8 topics including Fundamentals of Computer Networks, Evolution of Networking, Classification of Networks by Scale. BrainWeave provides free AI-powered explanations — by voice or text, in Hindi or English — with no signup required.

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What you'll learn

▸Fundamentals of Computer NetworksCore concept

computer networkresource sharingdata sharingnodepackets
▸Evolution of Networking

ARPANETTCP/IPDNSWorld Wide WebNSFNET
▸Classification of Networks by ScaleCore concept

PANLANMANWANgeographical area
▸Local Area Network (LAN) CharacteristicsCore concept

Local Area NetworkEthernethigh speedcampus networksecure
▸Wide Area Network (WAN) ConceptsCore concept

Wide Area NetworkInternetgeographical locationscontinentsinterconnection
▸Metropolitan Area Network (MAN)

Metropolitan Area Networkcity-widecable TVextended LAN
▸Modem (Modulator-Demodulator)Core concept

ModemModulatorDemodulatoranalog signaldigital signal
▸Ethernet Card (NIC)

Ethernet CardNICNetwork Interface Cardwired networkmotherboard

Chapter Summary

Understand the definition of a computer network, its primary purpose for sharing data and resources, and the basic components involved, such as nodes (hosts) and networking devices. This also includes the concept of data being transmitted in packets.

Learn about the historical development of computer networks, starting from the ARPANET project. Key milestones include the invention of email, the development of TCP/IP, the introduction of the Domain Name System (DNS), and the birth of the World Wide Web (WWW).

Distinguish between the main types of computer networks based on their geographical scope: Personal Area Network (PAN), Local Area Network (LAN), Metropolitan Area Network (MAN), and Wide Area Network (WAN).

Understand the specific features of a LAN, such as its limited geographical coverage (room, building, campus), high-speed data transfer rates (Ethernet, Gigabit Ethernet), and its use in private settings like schools and offices.

Grasp the concept of a WAN as a network that connects computers, LANs, and MANs across large geographical distances like countries and continents. Recognize that the Internet is the largest example of a WAN.

Understand MAN as an intermediary network that is larger than a LAN but smaller than a WAN, typically covering a city or a large town. Cable TV networks are a common example.

Learn the specific function of a Modem, which is to convert digital signals from a computer into analog signals for transmission over telephone lines (modulation) and to convert incoming analog signals back into digital signals (demodulation).

Identify the Ethernet Card, also known as a Network Interface Card (NIC), as the hardware component that provides the physical interface for a computer to connect to a wired network via an Ethernet cable.

Practice Questions from this Chapter

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Explain network topology simply. Get Solution →
Show examples of network nodes. Get Solution →
Compare LAN, MAN, WAN benefits. Get Solution →
What is an interconnection among two or more computers or computing devices called? Get Solution →
In a network, what are the smaller chunks that data is divided into for communication called? Get Solution →
What does LAN stand for? Get Solution →
What network was commissioned by the U.S. Department of Defence in the 1960s and was a precursor to the internet? Get Solution →
What does a Modem do at the receiver's end? Get Solution →

Did you know?

💡 The very first message sent over ARPANET only transmitted two letters before crashing.
💡 Thousands of kilometers of undersea cables carry most of the world's internet traffic.
💡 The '@' symbol was chosen for email addresses to mean 'at' a specific network location.
💡 Wi-Fi does not actually stand for 'Wireless Fidelity' despite popular belief.
💡 The entire Internet is estimated to weigh no more than a single strawberry.

Frequently Asked Questions

How many topics are covered in this chapter?

This chapter covers 8 key topics: Fundamentals of Computer Networks, Evolution of Networking, Classification of Networks by Scale, Local Area Network (LAN) Characteristics, Wide Area Network (WAN) Concepts, and more. The BrainWeave AI tutor explains each one with examples.

Is Chapter 10: Computer Networks important for board exams?

Yes — Class 12 is a CBSE board exam year, and every NCERT chapter is part of the syllabus. Use BrainWeave's AI tutor to master this chapter, then practice with the auto-generated quizzes and mind maps.

Can I get NCERT solutions for this chapter in Hindi?

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Related Chapters

Chapter 9: Structured Query Language (SQL)

Chapter 11: Data Communication

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