IT vocabulary comes up constantly in exams and daily life alike. This article covers the basics, and how IT has shaped Indian society and law.
Core Concepts: Hardware, Networks and Software
Core Hardware
- PartsA computer’s core hardware includes the CPU, the motherboard, and storage media. The CPU processes every instruction, the motherboard physically connects every other component, and storage media holds data even after power is switched off.
- Why It MattersEach part fails differently. A slow CPU makes everything sluggish. A failing motherboard can take the whole machine down at once, and failed storage can silently lose years of data.
LAN and WAN, and Open Source Software, and Cloud Computing
- LANA Local Area Network (LAN) connects devices in one location, like an office or a home, usually over cables or Wi-Fi the owner controls directly.
- WANA Wide Area Network (WAN) connects devices across much larger distances. The internet itself is the largest WAN in existence, stitching together countless smaller networks.
- DefinitionOpen Source Software has publicly available source code that anyone can inspect, modify and redistribute, unlike proprietary software whose code stays hidden.
- Why It Caught OnBecause anyone can inspect the code, bugs and security flaws get spotted by a wide community of volunteers, not just the original developer. Linux, the operating system running most of the world’s servers, is the best-known example.
- DefinitionCloud computing lets users store data and run applications on remote servers, accessed over the internet. It replaces relying only on a local device’s own storage and processing power.
- Why It MattersA phone with limited storage can still edit a huge video file this way. The heavy processing happens on someone else’s server, not the device in your hand.
Security, Law and Access
Malware and Phishing
- MalwareMalware, including computer viruses, worms and ransomware, is a major information security threat. It can steal data, lock files for ransom, or quietly hijack a device’s own resources.
- PhishingPhishing tricks users into revealing sensitive information, usually through a fake email or website that looks legitimate. It relies on human error, not a technical flaw in the system itself.
- Why Both MatterIT systems must defend against both at once. A perfectly secure network can still be broken into if one employee clicks the wrong link.
The IT Act, 2000, and Digital Literacy Movement, and Virtual Communities and Social Platforms
- LawThe Information Technology Act, 2000 is India’s primary law governing electronic transactions, cybercrime and digital signatures.
- Trouble ClauseThe Act’s Section 66A once let police arrest people for sending “offensive” online messages, based only on the officer’s own judgment. The Supreme Court struck it down in 2015 (Shreya Singhal v. Union of India) for being too vague and violating free speech.
- Zombie LawDespite that ruling, police kept filing new cases under Section 66A for years. In 2019 the Supreme Court had to step in again. It called it “shocking” and “terrible” that people were still being booked under a law it had already scrapped.
- GoalIndia’s Digital Literacy Movement aims to spread basic computer and internet skills, particularly to populations that missed earlier waves of technology adoption.
- SchemeIts main vehicle was the Pradhan Mantri Gramin Digital Saksharta Abhiyan (PMGDISHA), targeting 6 crore rural households, one person each. By the time it wound up, 6.39 crore people had actually been trained, past the original target. The course ran 20 hours across 5 modules, covering devices, the internet, and digital payments.
- ImpactVirtual online communities and social networking platforms have reshaped how people communicate, organise and access information, for better and for worse.
- ExampleThe same platform that lets a small business reach customers nationwide can also spread false rumours fast. No newspaper correction could ever catch up to that speed.
Wider Context: Impact, Innovation and Law’s Catch-Up
A Double-Edged Impact
- UpsideIT’s impact on Indian society is double-edged. It has expanded access to information, services and markets that were once out of reach for most people.
- DownsideBut it has also introduced new risks, like data privacy breaches and misinformation spreading faster than it can ever be corrected.
Sixth Sense: An Early Wearable Concept
- StoryAt TED 2009, MIT researcher Pranav Mistry unveiled SixthSense. It was a wearable rig built from a pocket projector, a mirror and a webcam, worn as a pendant around the neck.
- How It WorkedA camera tracked simple hand gestures marked with coloured fingertip caps, then projected digital information straight onto a wall, a hand, or any nearby surface.
- LegacyThe demo became one of TED’s most-watched talks. It was an early example of the augmented-reality thinking that later showed up in mainstream products.
Law Chasing a Moving Target
- PatternIndia’s IT law framework is built mainly around the 2000 Act. It has had to keep adapting to technology that moves faster than legislation typically can.
- ExampleThe Act predates smartphones, social media and cloud computing entirely. Every major addition since, from data-protection rules to intermediary guidelines, has been a patch applied after the technology already existed.
- TakeawayThis is a recurring tension in regulating any fast-changing technical field, not a one-time problem India has already solved.
✅ Test Yourself
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Exam Point of View
Digital Signatures and Firewalls: Precision Matters
- QuestionUPSC CSP 2019 (Q94) tested exactly what a digital signature legally is and does. CDS-II 2025 (Q85) asked which specific functions a firewall actually performs.
- WhyBoth questions reward knowing the precise, correct definition over a vague general sense of the term. A digital signature does identify the certifying authority, prove identity, and preserve document integrity — all three, not just one. A firewall examines packets, blocks unauthorised access, and stops suspicious activity — but has nothing to do with interconnecting telephones, a plausible-sounding but unrelated distractor.
- LinkUPSC CSP 2019, Q94 (digital signature) and CDS-II 2025, Q85 (firewall).
Mains: Data Security Law is a Recurring GS-III Ask
- QuestionGS-III Mains has asked candidates to discuss the Justice B.N. Srikrishna Committee’s data-security recommendations in 2018. It later asked them to describe the context and features of the Digital Personal Data Protection Act, 2023, in 2024.
- WhyExaminers are tracking the same policy story across years. India moved from having no dedicated data-protection law, through the Srikrishna Committee’s recommendations, to an actual Act and now its 2025 operational Rules.
- In practiceAnswer this theme as a timeline instead of describing the Act in isolation. Start with the gap the Srikrishna Committee identified, then show how the 2023 Act and 2025 Rules address it.
📰 Current Affairs
DPDP Rules, 2025, Notified
- 14 Nov 2025The Ministry of Electronics and Information Technology notified the Digital Personal Data Protection (DPDP) Rules, 2025. These fully operationalise the Digital Personal Data Protection Act, 2023, India’s main personal-data-privacy law.
- WhatThe Rules spell out how data fiduciaries, organisations handling personal data, must behave. They also cover how individuals can exercise their rights, breach-reporting procedures, and how the Data Protection Board of India will function.
- ProcessMeitY held public consultations in Delhi, Mumbai, Guwahati, Kolkata, Hyderabad, Bengaluru and Chennai, and received 6,915 inputs before finalising the Rules.
- PhasedImplementation is phased. The Data Protection Board’s establishment and rule-making powers took effect immediately, while consent-manager registration and full Board operations phase in over the following year.
- SourcePIB — DPDP Rules, 2025 Notified.
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