13.5 Internet, Networking, Cybersecurity & e-Governance
Key Takeaways
- The World Wide Web was invented by Tim Berners-Lee at CERN in 1989 and made publicly available in 1991; the Web runs on the Internet, it is not the Internet itself.
- DNS translates a domain name into an IP address; IPv4 uses 32 bits while IPv6 uses 128 bits to overcome IPv4 address exhaustion.
- A switch sends data only to the intended port, while a hub broadcasts to every port; a router connects different networks.
- Ransomware encrypts files and demands payment; the strongest defense is regular offline backups that malware cannot reach.
- Bhoomi is Karnataka's online land-records system (RTC), and Kaveri is its online property registration portal — both used daily by a VAO.
Internet Basics
The Internet is the global network of interconnected computers; the World Wide Web (WWW) is the system of linked documents accessed through browsers that runs on top of the Internet. The Web was invented by Sir Tim Berners-Lee at CERN in 1989 and became publicly available in 1991. A common exam trap is treating the Web and the Internet as the same thing — they are not; email, file transfer, and many other services also run over the Internet.
Key Concepts
- Browser — software used to view web pages (Google Chrome, Mozilla Firefox, Microsoft Edge)
- URL (Uniform Resource Locator) — a web address with the structure
scheme://domain/path, for examplehttps://bhoomi.karnataka.gov.in/ - HTTP (HyperText Transfer Protocol) — the rule set for transferring web pages between a server and a browser; HTTPS adds encryption using SSL/TLS, shown by the padlock icon in the address bar
- DNS (Domain Name System) — translates a human-readable domain name like
karnataka.gov.ininto a machine-usable IP address like168.50.200.10 - Search engine — a service such as Google or Bing that indexes web pages and ranks results by relevance
- Email — sent through SMTP (Simple Mail Transfer Protocol) and received through POP3 or IMAP; webmail services like Gmail wrap these protocols behind a friendly interface
A VAO often uses email to forward mutation orders and screenshots of online records to the Tahsildar, so knowing how to attach a file, write a clear subject line, and double-check the recipient address is practical — not just theoretical.
Networking
A network is a group of computers connected to share data and resources. Networks are classified by the area they cover:
- LAN (Local Area Network) — within a single building or office; the Tahsildar office's computers and printers typically form a LAN
- MAN (Metropolitan Area Network) — across a city; can connect several government offices within a taluka headquarters
- WAN (Wide Area Network) — across countries and continents; the Internet is the largest WAN
Network Topologies
| Topology | Shape | Note |
|---|---|---|
| Bus | Single backbone cable | Cheap to install; a cable break stops the whole network |
| Star | All nodes connect to a central hub or switch | Most common in offices; failure of one node does not affect others |
| Ring | Closed loop; each computer relays to the next | Used in some token-passing setups |
| Mesh | Every node links to every other node | Highly reliable but expensive; used in critical defence networks |
Transmission Media
- Twisted-pair cable — copper wires twisted to reduce interference; the standard office LAN cable
- Fibre optic — carries light pulses through glass; very high speed over long distances
- Wireless — Wi-Fi and mobile data (4G / 5G); no cable to lay
Network Devices
| Device | Role |
|---|---|
| Hub | Broadcasts incoming data to every port; unintelligent |
| Switch | Sends data only to the intended port; smart and efficient |
| Router | Connects different networks and routes packets by IP address |
| Modem | Converts digital data to analogue signals for telephone or cable lines |
IP addresses uniquely identify each device on a network: IPv4 uses 32 bits (written as four numbers like 192.168.1.1), while IPv6 uses 128 bits to overcome the exhaustion of IPv4 addresses. Wi-Fi (the IEEE 802.11 family of standards) lets devices connect wirelessly within range of a wireless access point.
Cybersecurity
Cybersecurity protects data, devices, and networks from attack. Revenue records contain citizens' land and personal details, so a Village Administrative Officer is a custodian of sensitive data — not a casual user. A breach can lead to identity theft, fraudulent mutations, and loss of public trust.
Threats vs Defenses
| Threat | What it does | Defense |
|---|---|---|
| Virus | Attaches to files; spreads when an infected file is opened | Antivirus software |
| Worm | Self-replicates across networks without needing a host file | Firewall + security patches |
| Trojan | Masquerades as a useful program to trick the user | Download only from trusted sources |
| Ransomware | Encrypts files and demands payment for the key | Regular offline backups |
| Spyware | Secretly records keystrokes and activity | Anti-spyware; careful installs |
| Phishing | Fake emails or websites trick users into revealing passwords or OTPs | Verify the sender; never share credentials |
| Malware | Umbrella term for all malicious software | Updated antivirus + firewall |
Safe Practices
- Use strong passwords — at least 8–12 characters mixing upper- and lower-case letters, digits, and symbols; never reuse the Bhoomi login password elsewhere
- Enable two-factor authentication (2FA) wherever it is offered, so a stolen password alone is not enough
- Keep the OS and antivirus updated; patches close holes that attackers already know about
- Back up records regularly, and keep one copy offline (an external USB hard drive) so ransomware cannot reach it
- Never insert an unknown USB drive into an office computer; it may carry malware
- Lock the screen (Windows + L) whenever you step away from the desk
Digital India and Karnataka e-Governance
- e-Governance — delivering government services electronically, cutting paperwork and the number of citizen visits
- Bhoomi — Karnataka's flagship online land-records system providing RTC (Record of Rights, Tenancy and Crops); a VAO verifies and updates RTC entries here daily
- Kaveri — Karnataka's online property registration portal for sale deeds, mortgage deeds, and encumbrance certificates
- Digital India — the national umbrella initiative promoting broadband, digital literacy, and online services to every citizen
A Village Administrative Officer who understands these systems, uses them correctly, and protects the data they hold works faster and serves citizens better.
Who invented the World Wide Web and in what year?
What is the key difference between a hub and a switch?
Which Karnataka online system provides RTC (Record of Rights, Tenancy and Crops) land records that a VAO verifies daily?