Class 12 Computer Science — Chapter 5: Internet and Web
Chapter 5: Internet and Web is a chapter in Class 12 Computer Science (Informatics Practices), part of the CBSE NCERT curriculum followed by over 25 million students across India. This chapter covers 9 topics including Fundamentals of Computer Networks, Local Area Network (LAN), Metropolitan Area Network (MAN). BrainWeave provides free AI-powered explanations — by voice or text, in Hindi or English — with no signup required.
What you'll learn
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▸Fundamentals of Computer NetworksCore conceptcomputer networkdata sharingresource sharingnodedata packets
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▸Local Area Network (LAN)Core conceptLANlimited areaEthernethigh speedcampus network
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▸Metropolitan Area Network (MAN)MANcity-wideinterconnected LANscable TVgeographical area
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▸Wide Area Network (WAN)Core conceptWANwide areaInternetcontinentsgeographical locations
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▸Modem (MOdulator-DEModulator)Core conceptmodemmodulationdemodulationanalog signaldigital signal
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▸Ethernet Card (Network Interface Card)NICEthernet CardMAC addresswired networkmotherboard
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▸Repeaterrepeatersignal regenerationweak signalextend distanceattenuation
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▸HubCore concepthubbroadcastdata collisionnetwork deviceunintelligent
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▸SwitchCore conceptswitchintelligent deviceunicastMAC address tablenetwork efficiency
Chapter Summary
Understanding the basic concept of a computer network as an interconnection of computing devices (nodes) to share data and resources. This includes recognizing components like hosts, networking devices, and the concept of data packets.
Understanding the characteristics of a LAN, which connects devices within a limited geographical area like an office or school campus. Key features include high-speed data transfer and secure access.
Understanding the concept of a MAN as a network that spans a larger geographical area like a city, often by interconnecting multiple LANs. An example is a cable TV network.
Understanding a WAN as a network that connects computers and other networks (LANs, MANs) across vast geographical distances, such as countries or continents. The Internet is the prime example of a WAN.
Understanding the function of a modem in converting digital computer signals to analog signals for transmission (modulation) and converting them back to digital at the receiving end (demodulation).
Understanding the role of an Ethernet Card (NIC) as a hardware component that provides the physical interface between a computer and a wired network, identified uniquely by its MAC address.
Understanding the purpose of a repeater in a network, which is to regenerate and strengthen communication signals to extend the distance over which data can be transmitted without degradation.
Understanding a Hub as a basic networking device that connects multiple computers in a LAN and broadcasts any incoming data to all connected devices, which can lead to data collisions.
Understanding a Switch as an intelligent network device that connects multiple computers and forwards data packets only to the intended recipient's port, improving network efficiency and reducing collisions.
Practice Questions from this Chapter
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- Explain how Wi-Fi connects. Get Solution →
- Show pictures of different networks. Get Solution →
- Discover the internet's oldest parts. Get Solution →
- What is a computer network defined as in the chapter? Get Solution →
- What does the acronym LAN stand for? Get Solution →
- According to the chapter, what is the largest example of a Wide Area Network (WAN)? Get Solution →
- What is the full form of the term 'Modem'? Get Solution →
- What is another name for an Ethernet card as mentioned in the text? Get Solution →
Did you know?
- 💡 The first computer network was called ARPANET, created in the 1960s.
- 💡 Information travels through giant undersea cables connecting continents together.
- 💡 The World Wide Web was invented by Tim Berners-Lee in 1989.
- 💡 Routers act like traffic controllers guiding data to its correct internet destination.
- 💡 The term "Wi-Fi" is actually a marketing term and doesn't stand for anything.
Frequently Asked Questions
How many topics are covered in this chapter?
This chapter covers 9 key topics: Fundamentals of Computer Networks, Local Area Network (LAN), Metropolitan Area Network (MAN), Wide Area Network (WAN), Modem (MOdulator-DEModulator), and more. The BrainWeave AI tutor explains each one with examples.
Is Chapter 5: Internet and Web 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?
Yes. BrainWeave's AI tutor supports Hindi, English, and Hinglish for both voice and text chat. Just ask your question in your preferred language.
Is BrainWeave free for Class 12 - Science?
Yes. BrainWeave's free Spark plan gives generous daily messages — enough for regular homework. Premium features unlock when you bring your own free Google Gemini API key.
Can I use voice chat for this chapter?
Absolutely. Tap the mic, ask any question about Chapter 5: Internet and Web, and the AI tutor will explain it back in voice and text.
How is BrainWeave better than static NCERT solutions sites?
Static solution sites give the same answer to everyone. BrainWeave adapts to your question — ask "explain like I'm 12" or "give a real-world example" and get a personalized response. Voice mode and Hindi support work seamlessly.
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