PAPER ONE: ICT/INFORMATION COMMUNICATION TECHNOLOGY

UGC NET PAPER 1 • UNIT 8

ICT Topic-wise Flashcard Notes

All high-yield points • Repeatedly asked in previous years

1. ICT: MEANING & EDUCATION

• ICT = Information and Communication Technology (UNESCO: scientific, technological and engineering disciplines to handle and process information).
• Includes old tools (radio, TV, telephone) and new tools (computers, internet, satellite, wireless).
• Four rationales (Cross & Adam): Social, Vocational, Catalytic, Pedagogical.
• Three parts: ICT Education, ICT-supported Education, ICT-enabled Education.
• Synchronous (same time): chat, instant messaging, video conferencing. Asynchronous (different time): email, forums, blogs, mailing lists, discussion boards.
• Learning categories: E-learning, Blended learning, Distance learning.
• Objectives of ICT in HE: improve access, quality, transparency, assessment, placement, analytics.
• Limitations: high cost, digital divide, power and literacy issues, delivery-only system, language barrier, need for training.

Exam alert: ICT is a broader term than IT. Questions on "synchronous vs asynchronous" and "four rationales" repeat often.

2. DIGITAL INITIATIVES (INDIA)

• SWAYAM: indigenous MOOCs platform; principles = access, equity, quality; credit transfer allowed.
• SWAYAM PRABHA: educational DTH channels, 24×7, new content 4 hours daily repeated 6 times.
• NMEICT: National Mission on Education through ICT (centrally sponsored); has Sakshat portal, Virtual Labs, Aakash tablet, e-Yantra, Spoken Tutorial.
• NPTEL: IITs + IISc; web/video courses; NOC = NPTEL Online Certification.
• NDL: National Digital Library, IIT Kharagpur. NAD: National Academic Depository (digital storage and verification of degrees).
• Shodhganga: PhD theses. Shodhgangotri: PhD synopses. Shodh Sindhu: e-resources consortium. INFLIBNET: Information and Library Network (UGC centre, Gandhinagar).
• e-PG Pathshala: PG e-content. e-Gyankosh: IGNOU repository. Gyan Darshan: TV channel. Gyan Vani: FM radio.
• NKN: National Knowledge Network (high-speed backbone). ERNET: Education and Research Network (DoE/MeitY). EDUSAT: education satellite (2004). GARUDA: national grid.
• CDEEP (IIT Bombay), FOSSEE (open-source software), Brihaspati (IIT Kanpur e-learning), Vidya Lakshmi (education loan portal), VIDWAN (experts database).
• BHIM: UPI-based payment app by NPCI. Digital India launched 2015.

Exam alert: Match-the-following on initiative → purpose is common. Learn the one-word purpose of each.

3. WEB 1.0 / 2.0 / 3.0

Basis	Web 1.0	Web 2.0	Web 3.0
Nature	Read-only, static	Read-write, social	Semantic, intelligent
Focus	Company	Community	Individual
Examples	Britannica, home pages	Wikipedia, blogs, Facebook	Smart apps, metaverse
Tech	HTML, portals	XML, RSS, AJAX	RDF, RDFS, OWL

• Web 3.0 features: semantic web, AI, 3D graphics, ubiquity, blockchain.
• Web 2.0 = "participative/social web", term popularised by Tim O'Reilly.
• WWW invented by Tim Berners-Lee at CERN; W3C sets standards.

4. GENERATIONS OF COMPUTERS

Gen	Period	Technology	Examples
1st	1942–59	Vacuum tubes	ENIAC, EDVAC, IBM 701
2nd	1959–65	Transistors	IBM 7030, CDC 1604
3rd	1965–75	Integrated Circuits (IC)	IBM 360/370, PDP-8
4th	1975–88	VLSI, microprocessor	Apple II, VAX 9000
5th	1988–present	ULSI, AI, parallel processing	Pentium, PARAM

• By function: Analogue, Digital, Hybrid. By size: Super > Mainframe > Mini > Workstation > Micro.
• PARAM = India's supercomputer series by C-DAC Pune. Supercomputers used for weather forecasting, nuclear research, design.
• Digital computers work on binary (0/1), basis in Boolean logic.

5. CPU, MEMORY & STORAGE

• CPU parts: ALU (arithmetic and logic), CU (control), Memory/Registers. Called the "brain" of the computer.
• Hierarchy (fast→slow, costly→cheap): Registers → Cache → RAM → Hard disk → Magnetic tape.
• Primary memory: RAM (volatile) and ROM (non-volatile). Secondary: HDD, SSD, CD/DVD, pen drive.
• ROM types: PROM (once), EPROM (UV erase), EEPROM (electric erase = flash).
• RAM types: SRAM (cache, faster, costly), DRAM (main memory, needs refreshing).
• Cache is the fastest memory after registers, sits between CPU and RAM.
• SSD has no moving parts; HDD uses magnetic platters. Flash drives = USB/pen drives.
• BIOS (Basic Input/Output System) stored in ROM; runs at booting.
• Bus = set of wires carrying data. Motherboard = main circuit board.
• Input: keyboard, mouse, scanner, microphone. Output: monitor, printer, speaker, plotter.

Exam alert: "Arrange memories by speed" and "which is volatile" are favourite questions.

6. SOFTWARE & PROGRAMMING

• System software: OS, compilers, interpreters, assemblers, utilities.
• Application software: MS Word, Excel, PowerPoint, Tally, Acrobat Reader.
• Utility: antivirus, backup, disk defrag, compression (WinZip).
• OS functions: memory, process and file management, I/O control. Examples: Windows, Linux, Unix, Mac OS, Android, DOS.
• Open source: source code freely available (Linux, Mozilla Firefox, Moodle). Proprietary: Windows, MS Office.
• Language levels: Machine (binary) → Assembly (mnemonics, translated by assembler) → High-level (Python, Java, C++).
• Compiler: whole program at once. Interpreter: line by line.
• Source program → compiler → object program.
• Freeware = free to use; Shareware = free trial; Firmware = software in ROM.

7. NUMBER SYSTEMS & UNITS

• Bases: Binary 2 (0,1) • Octal 8 (0–7) • Decimal 10 (0–9) • Hexadecimal 16 (0–9, A–F).
• Decimal → binary: divide by 2, read remainders bottom to top. Binary → decimal: multiply each digit by powers of 2.
• Key values: 13 = 1101 • 25 = 11001 • 48 = 110000 • 57 = 111001.
• Units: 1 bit → 1 Byte = 8 bits • 1 KB = 1024 B • 1 MB = 1024 KB • 1 GB = 1024 MB • 1 TB = 1024 GB • then PB, EB, ZB, YB.
• Nibble = 4 bits. Word = group of bytes processed together.
• ASCII: 7-bit (128 characters); extended = 8-bit (256). EBCDIC: IBM, 8-bit. Unicode: universal, all languages.
• Hex F = 15 (binary 1111). A = 10, B = 11, C = 12, D = 13, E = 14.

Exam alert: Expect 1 conversion or unit question every paper. Practise small numbers quickly.

8. COMPUTER NETWORKS & TOPOLOGY

• PAN (personal, ~10 m, Bluetooth) < LAN (building) < CAN (campus) < MAN (city) < WAN (country/world). WLAN = wireless LAN. SAN = storage network. VPN = private tunnel over public internet.
• Topologies: Bus (one backbone cable), Star (central hub/switch), Ring (closed loop), Mesh (all connected), Tree (hierarchical star).
• Star: failure of one node does not affect others, but hub failure stops all. Mesh: most reliable, most costly.
• Devices: Hub (broadcasts), Switch (smart, MAC-based), Bridge (links LANs), Router (path between networks), Gateway (different protocols), Modem (digital↔analogue), Repeater (boosts signal).
• Intranet: private to organisation. Extranet: intranet shared with outsiders. Internet: public network of networks.
• Transmission modes: Simplex (one way), Half-duplex (both, one at a time), Full-duplex (both together).
• Connections: Dial-up, DSL/ADSL, Broadband, Leased line, Cable, Wi-Fi, WiMAX, Satellite (VSAT).
• Bluetooth: short-range wireless. Wi-Fi: wireless fidelity (IEEE 802.11).

9. INTERNET, WWW & PROTOCOLS

• Origin: ARPANET (1969, US Defence). Protocols TCP/IP by Vint Cerf and Bob Kahn. WWW by Tim Berners-Lee (1989–91, CERN).
• TCP divides data into packets; IP addresses and routes them.
• IPv4: 32-bit, four numbers (0–255). IPv6: 128-bit. Range 0.0.0.0 to 255.255.255.255.
• HTTP (web pages) • HTTPS (secure, SSL/TLS) • FTP (file transfer) • SMTP (send mail) • POP3/IMAP (receive mail) • Telnet (remote login) • UDP (connectionless) • DNS (name→IP).
• HTML: HyperText Markup Language, builds web pages. XML: user-defined tags. CSS: styling.
• URL: address of a resource, e.g. protocol://domain/path. ISP: Internet Service Provider.
• Domain codes: .com commercial • .edu education • .gov government • .mil military • .net network • .org organisation • .in India • .uk UK • .au Australia • .jp Japan • .cn China • .de Germany • .us USA.
• Browsers: Chrome, Firefox, Safari, Opera, Edge. Search engines: Google, Bing, Yahoo, DuckDuckGo, Baidu, Yandex. Meta search: Dogpile, MetaCrawler.
• Home page = first page of a website. Hyperlink = clickable link. Bookmark = saved address. Cookie = small data stored by site on your browser.

Exam alert: Full forms (HTTP, FTP, SMTP, URL, ISP, DNS, WWW) and protocol-purpose matching appear almost every year.

10. EMAIL & MESSAGING

• Format: username@domain.tld. "@" separates user name and domain. Not case-sensitive; no spaces.
• Fields: From, To, CC (visible copy), BCC (hidden copy), Subject, Date, Message-ID, Reply-To, Body, Signature, Attachment.
• Email uses: SMTP (send), POP3/IMAP (receive). Based on push technology.
• Folders: Inbox, Sent, Drafts, Trash/Deleted, Spam/Junk, Outbox.
• Types: web-based (Gmail, Yahoo, Hotmail) and client-based (Outlook, Thunderbird).
• Mail Merge: one letter, many personalised copies (MS Word).
• Instant messaging: real-time text/voice (WhatsApp, Telegram). Chat room = synchronous group.
• Asynchronous messaging: email, SMS. Synchronous: chat, call.
• Unified messaging combines email, voice mail and fax into one mailbox.

11. AUDIO & VIDEO CONFERENCING

• Audio conferencing: voice-only calls among distant participants. Cost-effective, accessible, saves time.
• Disadvantages: only verbal, participants may lose focus, quality may be unreliable.
• Video conferencing: live two-way audio + video. Uses camera, microphone, codec, MCU (multipoint control unit).
• Types: Hardware-based, Software-based, Hybrid.
• Tools: Zoom, Skype, Google Meet, MS Teams, Cisco WebEx, Microsoft Lync.
• Teleconferencing: conference through telephone/satellite links. VoIP: voice over internet protocol (Skype, Vonage).
• Webinar: seminar over the web. Interactive whiteboard (IWB): touch-sensitive projection board.

12. VIRUSES & CYBER THREATS

• Virus: malicious program that attaches itself to files and spreads when run.
• Worm: self-replicating, spreads over networks without host file.
• Trojan horse: looks useful but harmful; does not replicate.
• Boot sector virus (infects boot record), Macro virus (Word/Excel documents), File infector (.exe/.com), Polymorphic (changes its signature), Stealth (hides itself).
• Logic bomb: triggers on a condition/date.
• Phishing: fake email/site to steal credentials. Spam: unsolicited bulk mail. Spoofing: pretending to be a trusted source. Hacking: unauthorised access. Spyware: secretly gathers user data. Adware: shows unwanted ads.
• Ransomware: locks files for payment. Cyber stalking / bullying are cyber crimes. IT Act 2000 is India's main cyber law (amended 2008).
• Prevention: antivirus, OS patches, firewall, strong passwords, avoid unknown attachments, regular backup.
• Firewall: software/hardware barrier that filters network traffic. Encryption: scrambling data for privacy.

Exam alert: Worm vs virus vs Trojan differences and "phishing" are asked repeatedly.

13. E-COMMERCE & MOBILE APPS

• Types: B2C, B2B, C2C, P2P, M-commerce.
• Applications: electronic payments, banking gateway, e-ticketing, e-shopping.
• Payment security needs: authentication, integrity, non-repudiation, privacy, safety of card data.
• BHIM / UPI: instant mobile bank-to-bank payment by NPCI.
• Apps: Native (OS-specific, installed), Web (browser-based), Hybrid (mix).
• Mobile OS: Android (Google), iOS (Apple). Mobile app stores: Google Play, App Store.
• SIM: Subscriber Identity Module. GPRS/3G/4G/5G: mobile data generations.

14. ICT & E-GOVERNANCE

• E-governance = use of ICT by government to deliver services and information to citizens, business and employees.
• SMART governance: Simple, Moral, Accountable, Responsive, Transparent.
• Interfaces: G2C, G2B, G2E, G2G.
• Aims: transparency, accountability, efficiency, reduced corruption, citizen participation, cost saving.
• Challenges: digital divide, poor infrastructure, language barrier, cyber security, resistance to change, low literacy.
• Conventional vs ICT governance: secretive vs transparent; hierarchical vs networked; one-way vs direct; slow vs pro-active.
• Initiatives: Digital India, DigiLocker, UMANG, e-Sampark, India Portal, CSC (Common Service Centres), Aadhaar, e-Courts, GeM, MyGov.
• Legal base: IT Act 2000.

Exam alert: Expect questions on G2C/G2B meaning, SMART expansion and benefits of e-governance.

15. FULL FORMS (MOST ASKED)

ICT Information & Communication Technology • CPU Central Processing Unit • ALU Arithmetic Logic Unit • CU Control Unit • RAM Random Access Memory • ROM Read Only Memory • BIOS Basic Input Output System • GUI Graphical User Interface • CUI Character User Interface • ASCII American Standard Code for Information Interchange • EBCDIC Extended Binary Coded Decimal Interchange Code • LAN/MAN/WAN Local/Metropolitan/Wide Area Network • MODEM Modulator-Demodulator • ISP Internet Service Provider • HTTP HyperText Transfer Protocol • HTML HyperText Markup Language • FTP File Transfer Protocol • SMTP Simple Mail Transfer Protocol • TCP/IP Transmission Control Protocol / Internet Protocol • URL Uniform Resource Locator • DNS Domain Name System • WWW World Wide Web • VoIP Voice over Internet Protocol • VPN Virtual Private Network • VSAT Very Small Aperture Terminal • OSI Open Systems Interconnection • OCR Optical Character Recognition • PDF Portable Document Format • JPEG Joint Photographic Experts Group • GIF Graphics Interchange Format • PNG Portable Network Graphics • MPEG Moving Picture Experts Group • CD-ROM Compact Disc Read Only Memory • DVD Digital Versatile Disc • USB Universal Serial Bus • LCD Liquid Crystal Display • CRT Cathode Ray Tube • VGA Video Graphics Adapter • MOOC Massive Open Online Course • VLE Virtual Learning Environment • CALL Computer Assisted Language Learning • LMS Learning Management System • NMEICT National Mission on Education through ICT • NPTEL National Programme on Technology Enhanced Learning • SWAYAM Study Webs of Active-Learning for Young Aspiring Minds • NDL National Digital Library • NAD National Academic Depository • INFLIBNET Information and Library Network • ERNET Education and Research Network • NKN National Knowledge Network • BHIM Bharat Interface for Money • UPI Unified Payments Interface • NPCI National Payments Corporation of India • C-DAC Centre for Development of Advanced Computing • ARPANET Advanced Research Projects Agency Network • W3C World Wide Web Consortium • IETF Internet Engineering Task Force • IC Integrated Circuit • VLSI Very Large Scale Integration • PDA Personal Digital Assistant • ROM types PROM, EPROM, EEPROM • BCC Blind Carbon Copy

16. LAST-DAY REVISION CHECKLIST

• Learn all full forms from Card 15.
• Remember the generation → technology table (Vacuum tube, Transistor, IC, VLSI, ULSI/AI).
• Practise decimal ↔ binary for numbers under 64.
• Know memory order and which memories are volatile.
• Be clear on virus vs worm vs Trojan, and phishing vs spam.
• Match each digital initiative to its single purpose.
• Remember G2C, G2B, G2E, G2G and SMART.
• Know protocol use: SMTP send, POP/IMAP receive, FTP files, HTTP pages, DNS names.

LitPrepX • UGC NET Paper 1 • ICT Notes