Internet Basics Questions for IBPS CLERK

What is the Internet

The Internet is a global network of millions of computers and devices connected together using standardized communication protocols. Think of it as a massive highway system where data travels in packets from one computer to another. It is not owned by any single person or government — it is a decentralized network. The World Wide Web (WWW) is a service that runs ON the internet, not the internet itself. This distinction is a favourite trick question.

• Internet = the physical/logical global network infrastructure
• WWW = a collection of web pages accessed via the internet using HTTP
• Internet was originally called ARPANET, developed by the US Department of Defense
• India got internet access in 1995 through VSNL (Videsh Sanchar Nigam Limited)
• Tim Berners-Lee invented the World Wide Web in 1989

Key Protocols and Their Uses

A protocol is simply a set of rules that computers follow to communicate. Each internet service has its own protocol. IBPS Clerk loves asking full forms and what each protocol does. Memorize the protocol name, its full form, and its purpose.

• HTTP (HyperText Transfer Protocol) — transfers web pages; HTTPS is the secure version
• FTP (File Transfer Protocol) — used to transfer files between computers
• SMTP (Simple Mail Transfer Protocol) — used to SEND emails
• POP3 (Post Office Protocol v3) — used to RECEIVE/download emails to local device
• IMAP (Internet Message Access Protocol) — access emails on server without downloading
• TCP/IP (Transmission Control Protocol/Internet Protocol) — core protocol suite of the internet

URL, Domain Names, and IP Address

A URL (Uniform Resource Locator) is the complete address of a resource on the internet. For example, https://www.sbi.co.in/careers is a URL. The domain name is the readable name (like sbi.co.in) that maps to a numeric IP address via DNS. An IP address is a unique numerical label assigned to every device on a network. IPv4 uses 32-bit addresses (like 192.168.1.1) and IPv6 uses 128-bit addresses.

• URL full form: Uniform Resource Locator
• DNS (Domain Name System) — converts domain names to IP addresses, like a phone directory
• IP address: unique identity of a device on a network
• IPv4 = 32-bit, IPv6 = 128-bit (created because IPv4 addresses were running out)
• Common domain extensions: .com (commercial), .edu (education), .gov (government), .org (organization), .in (India)

Types of Networks

Networks are classified by their geographic coverage. LAN covers a small area like an office, MAN covers a city, and WAN covers a large geographic area or even the entire world. The Internet itself is the largest WAN. These definitions come up as direct questions in IBPS Clerk.

• LAN (Local Area Network) — small area like a room, building, or campus
• MAN (Metropolitan Area Network) — city or town level
• WAN (Wide Area Network) — country or global level; internet is the biggest WAN
• PAN (Personal Area Network) — very short range, around a person (e.g., Bluetooth)
• VPN (Virtual Private Network) — secure private connection over the public internet

Internet Services and Browsers

The internet supports many services beyond just browsing web pages. Email, video conferencing, file sharing, online banking, and streaming are all internet services. A web browser is software used to access the WWW. Knowing popular browsers and their developers is a high-frequency IBPS question.

• Google Chrome — developed by Google
• Mozilla Firefox — developed by Mozilla Foundation
• Safari — developed by Apple
• Internet Explorer / Edge — developed by Microsoft
• ISP (Internet Service Provider) — company that provides internet access, e.g., Jio, Airtel, BSNL
• Modem (Modulator-Demodulator) — device that converts digital signals to analog and back for internet transmission

Important Internet Terminology

A set of standalone terms are tested directly in IBPS Clerk as single-answer questions. These are pure memory items — no logic needed, just recall.

• WWW — World Wide Web, invented by Tim Berners-Lee
• HTML (HyperText Markup Language) — language used to create web pages
• Bandwidth — amount of data that can be transferred per second; measured in bps, Kbps, Mbps, Gbps
• Cookie — small file stored on user's browser by a website to remember preferences
• Cache — temporary storage that saves copies of web pages for faster loading
• Firewall — security system that monitors and controls incoming/outgoing network traffic
• Hyperlink — clickable link that connects one web page to another

• Confusing WWW with the Internet — they are NOT the same. WWW is a service on the internet. Exam often gives both as options to trick you.
• Mixing up SMTP and POP3 — remember SMTP is for SENDING mail (S = Send), POP3 is for receiving/downloading
• Thinking Internet Explorer is still developed — Microsoft replaced it with Edge. Edge questions are appearing in recent papers.
• Confusing bandwidth units — Gbps is greater than Mbps is greater than Kbps is greater than bps. Do not reverse the order.
• Forgetting that ARPANET is the origin of the internet, not the WWW — ARPANET came first (1960s), WWW came in 1989

• SMTP vs POP3: S for Send (SMTP), P for Pick up/collect (POP3) — you SEND via SMTP, you PICK UP via POP3
• LAN MAN WAN size order: Like a building going taller — Local (room) to Metro (city) to Wide (world). Smallest to biggest: LAN less than MAN less than WAN
• Protocol full forms trick: FTP = Files Travel Please, HTTP = HyperText Talk Protocol, IMAP = I Mail Access Please — use silly sentences to recall full forms
• Tim Berners-Lee and WWW: Think TBL = Three Big Letters = WWW (three W's) — TBL invented WWW

• IBPS Clerk Computer section has 10 questions; Internet Basics typically contributes 2-3 questions. These are among the easiest marks available — do not skip this topic.
• Questions are almost always direct: What does FTP stand for? Who invented WWW? Which protocol is used to send email? No complex application needed.
• Recent papers (2021-2023) have started including questions on Cloud Computing terms like SaaS, IaaS, PaaS — these are extensions of internet basics, so revise them too.
• Browser developer questions are evergreen — Chrome by Google, Firefox by Mozilla, Safari by Apple, Edge by Microsoft. These appear almost every year.
• Time to spend per question here: 20-25 seconds maximum. If you have memorized terms, these are instant marks. Do not spend more than 30 seconds on any computer knowledge question.