Internet, Browsers & E-mail
🔒 Log in to trackInternet history and structure, browsers vs search engines, URL/DNS, e-mail mechanics (To/CC/BCC, SMTP/POP3/IMAP) and India's e-banking rails (UPI, NEFT, RTGS). Full forms and the browser-vs-engine trap are asked every year.
One page per subtopic: detailed notes, every question type, formulas, tricks and practice sets.
Every formula on one printable page, grouped by subtopic.
4 exam-level questions worked step by step.
69 questions — untimed practice or a timed test with analysis.
Track record in the exam
Test difficulty mix (69 questions)
Question patterns exams keep repeating
Taken from previous-year papers. If a pattern is marked "very common", expect to see it in your exam.
Full form / abbreviation
very common'Full form of HTTP/HTML/URL/ISP/SMTP/ATM/IFSC/OTP' or a wrongly matched pair where one word of an expansion is changed.
How to solve: Expand letter by letter from family tables: web family (HTTP, HTML, URL, WWW), mail family (SMTP, POP3, IMAP, e-mail @), banking family (NEFT, RTGS, UPI, NPCI, IFSC, MICR, OTP, CVV, PIN, ATM). The planted error is one swapped word, e.g. 'Hyper Transfer Markup Language' for HTML.
Example: The full form of SMTP is:
Simple Mail Transfer Protocol — the sending protocol of e-mail.
Browser vs search engine trap
very common'Which is a browser?' with Google planted among Chrome/Firefox, or 'which is a search engine?' with Chrome planted among Bing/Yahoo.
How to solve: Browsers are programs installed on your device (Chrome, Edge, Firefox, Safari, Opera); search engines are websites reached through them (Google, Bing, Yahoo, DuckDuckGo). The famous trap: Google called a browser, or Chrome called a search engine.
Example: Which of the following is a web browser?
Chrome — the program that shows pages; Google is the search engine inside it.
CC/BCC visibility scenario
very commonA mail scenario: who can see whose address, what Reply All reaches, or which field protects a bulk list of receivers.
How to solve: CC is a visible copy (everyone in To/CC sees all those addresses); BCC is blind (To/CC never see the BCC list, and BCC receivers are hidden from each other). Bulk mails to strangers go in BCC; Reply All on a BCC'd mail reaches only the sender.
Example: A mail to 200 customers uses BCC for all addresses. Reply All by one customer reaches:
Only the sender — the BCC list stays hidden.
Protocol-to-purpose matching
very common'Protocol used to send e-mail', 'which protocol syncs mail across devices', 'protocol that moves web pages', 'protocol of file transfer' — directions matched.
How to solve: Fix the map: SMTP sends mail; POP3 downloads to one device; IMAP syncs on the server; HTTP/HTTPS move web pages (443 = secure); FTP transfers files; DHCP assigns IPs; DNS resolves names. Sending questions always answer SMTP.
Example: Which protocol is used to send e-mail from a client to the mail server?
SMTP — Simple Mail Transfer Protocol; POP3 and IMAP only receive.
E-banking rails and limits
very common'Minimum of 2 lakh belongs to which system?', 'which is instant 24x7', 'full form of NEFT/RTGS/UPI', 'UPI is run by ___' — the rails mixed in options.
How to solve: NEFT = batch transfers, no minimum; RTGS = real-time, transaction-wise, minimum 2,00,000 rupees; IMPS = instant inside banking apps; UPI = instant by UPI ID/QR, built by NPCI. The recurring trap gives NEFT the 2-lakh floor that belongs to RTGS.
Example: A transfer of 5,00,000 rupees is needed immediately, transaction by transaction. Which system fits?
RTGS — real-time gross settlement, designed for high-value transfers (minimum 2 lakh).
URL anatomy
commonA URL is printed and a part is asked: protocol, domain, country code or path; or the full form of URL.
How to solve: Split at slashes: protocol (https://) + domain (www.site.in) + path (/folder/page.html). Country codes: .in India, .uk UK; generic: .com, .org, .gov, .edu. DNS converts the whole domain to an IP address.
Example: In https://www.mysite.in/exams/ssc.html, 'www.mysite.in' is the:
Domain name — https is the protocol; /exams/ssc.html is the path.
Security-code identification
common'Which code has 11 characters', 'the 9-digit cheque code', 'the 3-digit number on the card', 'which code for international transfers'.
How to solve: Line them up: IFSC = 11 characters (4 bank letters + 0 + 6 branch) for domestic transfers; MICR = 9 digits on the cheque strip; CVV = 3 digits on the card back; PIN = your secret at machines; OTP = one-time password; SWIFT = international transfers.
Example: The number of characters in an IFSC code is:
11 — for example SBIN0001234: bank (SBIN) + 0 + branch (001234).