Internet Basics Questions for IBPS RRB CLERK

What is the Internet

The Internet is a global network of millions of computers and devices connected together using a standard set of rules called protocols. Think of it as the world's largest highway system — every device is a city, and data packets are vehicles travelling on these highways. The Internet is not owned by any single person, company, or government. It is a public network. The World Wide Web (WWW) is a service that runs ON the Internet — it is not the same as the Internet itself.

• Internet = global network of networks using TCP/IP protocol
• WWW is a service on the Internet, not the Internet itself
• Internet started as ARPANET, a US military project in 1969
• ISP (Internet Service Provider) is the company that gives you internet access — e.g., BSNL, Jio, Airtel
• Bandwidth is the amount of data that can be transmitted per second — higher bandwidth means faster internet

Protocols — The Rules of the Road

A protocol is a set of rules that computers follow to communicate with each other. Just like traffic rules ensure cars move safely, protocols ensure data moves correctly across the internet. The most important protocol is TCP/IP (Transmission Control Protocol / Internet Protocol). Different services use different protocols.

• HTTP (HyperText Transfer Protocol) — used for browsing websites
• HTTPS — secure version of HTTP, uses encryption (look for the padlock icon in browser)
• FTP (File Transfer Protocol) — used for transferring files between computers
• SMTP (Simple Mail Transfer Protocol) — used for SENDING emails
• POP3 / IMAP — used for RECEIVING emails (POP3 downloads, IMAP syncs)
• TCP/IP — the foundational protocol suite of the entire Internet

URL, Domain Name, and IP Address

Every website has an address. The URL (Uniform Resource Locator) is the full address you type in the browser. The Domain Name is the human-readable part like google.com. The IP Address is the numeric address like 192.168.1.1 that computers actually use. DNS (Domain Name System) acts like a phone book — it converts domain names into IP addresses so your computer can find the right server.

• URL example: https://www.google.com/search — it includes protocol + domain + path
• DNS = Domain Name System — converts google.com to its IP address
• IP Address — unique numeric identity of every device on a network
• Domain extensions: .com (commercial), .org (organisation), .in (India), .gov (government), .edu (education)
• WWW stands for World Wide Web — invented by Tim Berners-Lee in 1989

Web Browsers and Search Engines

A web browser is software used to access and view websites. It reads HTML files and displays them as webpages. Popular browsers are Google Chrome, Mozilla Firefox, Microsoft Edge, and Safari. A search engine is a tool that helps you find websites on the internet. Do not confuse the two — Chrome is a browser, Google is a search engine. You use Chrome (browser) to visit Google (search engine).

• Browser examples: Google Chrome, Mozilla Firefox, Microsoft Edge, Opera, Safari
• Search engine examples: Google, Bing, Yahoo, DuckDuckGo
• Homepage — the first page that opens when you launch a browser
• Cache — temporary storage in browser that speeds up loading of visited pages
• Cookies — small files stored by websites on your computer to remember your preferences

Email Concepts

Email (Electronic Mail) is the system for sending messages over the internet. Each email address has two parts separated by the @ symbol — the username and the domain (e.g., raju@gmail.com). Knowing the email terms is important for the exam as they appear frequently.

• CC (Carbon Copy) — sends a copy to others; all recipients can see who received it
• BCC (Blind Carbon Copy) — sends a copy but other recipients cannot see BCC addresses
• Attachment — a file (doc, image, etc.) sent along with an email
• Spam — unwanted/junk emails, usually advertisements or scams
• SMTP sends email, POP3/IMAP receives email — remember Send = SMTP

Key Internet Terminology

The exam frequently asks about definitions of common internet terms. These are short factual questions worth quick marks. Study this list carefully.

• Firewall — security system that monitors and controls incoming/outgoing network traffic
• VPN (Virtual Private Network) — creates a secure, encrypted connection over the internet
• Upload — sending data from your device to the internet; Download — receiving data from the internet
• Hyperlink — clickable text or image that takes you to another webpage
• HTML (HyperText Markup Language) — the basic language used to create webpages
• Modem — device that converts digital signals to analog for transmission through telephone lines and vice versa

• Confusing the Internet with the WWW — Internet is the physical network infrastructure, WWW is just one service running on it
• Mixing up SMTP and POP3 — SMTP is for SENDING email, POP3/IMAP is for RECEIVING. Many aspirants reverse these
• Confusing a Browser with a Search Engine — Chrome, Firefox are browsers; Google, Bing are search engines. This is a very common trap question
• Thinking HTTPS and HTTP are the same — HTTPS is the secure version with encryption, used for banking and login pages
• Confusing CC and BCC — in CC everyone sees all recipients; in BCC the extra recipients are hidden from others

• SMTP = Send Mail To People — the S in SMTP reminds you it is for Sending email
• Browser vs Search Engine trick: Browser is the VEHICLE (Chrome, Firefox), Search Engine is the DESTINATION (Google, Bing). You drive the vehicle to reach the destination
• Protocol mnemonic — FHS: FTP for Files, HTTP for HTML pages, SMTP for Sending mail
• DNS = Desh ka Naam System — it translates the name (domain) into an address (IP), just like a telephone directory translates a name into a phone number

• IBPS RRB Clerk typically asks 1-2 direct definition questions on protocols — especially SMTP vs POP3 and HTTP vs HTTPS. Memorise these pairs cold
• Browser vs Search Engine is a favourite trick question in recent years — expect at least one such question per attempt
• Questions on URL structure (what does .gov, .edu, .in mean) and who invented the WWW (Tim Berners-Lee) appear regularly
• Email terminology (CC, BCC, Spam, Attachment) appears as 1-mark factual questions — very scoring, never skip these
• Avoid spending more than 30 seconds per Computer question — these are pure recall questions. If you have revised well, answer instantly and move on