Internet, Email and Networking — Practice

Question 1

HTTP stands for:
(a) HyperText Transfer Protocol (b) High Transfer Text Protocol (c) HyperText Terminal Process (d) Host Transfer Text Program

Accepted Answer

(a) HyperText Transfer Protocol — the protocol browsers use to fetch web pages. HTTPS adds encryption (S = Secure).

Question 2

Which protocol is used for SENDING email?
(a) POP3 (b) IMAP (c) SMTP (d) FTP

Accepted Answer

(c) SMTP (Simple Mail Transfer Protocol).

POP3 and IMAP are receiving protocols; FTP transfers files. Hook: SMTP — S for Send.

Question 3

In email, BCC stands for:
(a) Blind Carbon Copy (b) Bulk Carbon Copy (c) Basic Communication Copy (d) Broadcast Copy

Accepted Answer

(a) Blind Carbon Copy.

BCC recipients receive the mail but stay invisible to every other recipient — unlike CC, where the list is visible to all.

Question 4

A computer network confined to a single office building is called a:
(a) WAN (b) MAN (c) LAN (d) PAN

Accepted Answer

(c) LAN (Local Area Network).

The reach ladder: PAN (personal, metres — Bluetooth), LAN (building), MAN (city), WAN (countries — the internet).

Question 5

The World Wide Web was invented by:
(a) Bill Gates (b) Tim Berners-Lee (c) Vint Cerf (d) Steve Jobs

Accepted Answer

(b) Tim Berners-Lee, at CERN in 1989.

Vint Cerf is called a 'father of the internet' (TCP/IP) — the planted near-miss; the web is a service on the internet, not the internet itself.

Question 6

Which device converts digital computer signals into analog signals for transmission over telephone lines?
(a) router (b) switch (c) modem (d) repeater

Accepted Answer

(c) modem — modulator-demodulator; the name is the function.

The router directs traffic between networks, the switch connects devices within a LAN, the repeater regenerates weak signals.

Question 7

The main function of DNS (Domain Name System) is to:
(a) encrypt web traffic (b) translate domain names into IP addresses (c) assign MAC addresses (d) block spam email

Accepted Answer

(b).

DNS is the internet's phonebook: you type google.com, DNS returns the numeric IP address computers actually connect to. Encryption is SSL/TLS; MAC addresses come burned into the network card.

Question 8

In which network topology are all computers connected to a single central hub?
(a) bus (b) ring (c) star (d) mesh

Accepted Answer

(c) star.

Star is the common office layout; its weakness is that hub failure disconnects everyone. Bus uses one backbone cable, ring loops node-to-node, mesh connects everyone to everyone.

Question 9

An IPv4 address is:
(a) 16-bit (b) 32-bit (c) 64-bit (d) 128-bit

Accepted Answer

(b) 32-bit — four numbers from 0 to 255 separated by dots (e.g., 192.168.1.1).

IPv6, its 128-bit successor, was created because the IPv4 address space ran out.

Question 10

The 'S' in HTTPS indicates that the connection is:
(a) speedy (b) standard (c) secure (d) shared

Accepted Answer

(c) secure.

HTTPS encrypts traffic using SSL/TLS — the padlock in the address bar. It is also the first thing to check before entering banking or password details online.

Practice — Internet, Email and Networking

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