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Networks and internet protocols quiz

Practise network fundamentals, packet transmission, IP and MAC addresses, DNS, routers, TCP, and HTTPS.

syllabus — topic scope & references
  • Distinguish network devices and addressing
  • Explain packets, protocols, and reliable transmission
  • Recognise what HTTPS protects

Cambridge IGCSE 0478 (2026–2028): 2.1, 3.4, 5.1 Data transmission; network hardware; the internet.

IB Computer Science (first assessment 2027): A.2 Networks.

Original practice on shared foundations. Topic-area links do not imply complete syllabus or SL/HL coverage. Not affiliated with or endorsed by Cambridge or the IB.

Related: Computer architecture and memory · Binary and hexadecimal

NETWORKS AND INTERNET PROTOCOLS QUIZ
10 questions. Type a, b, or c, then Enter. Explanations follow each answer.
Type review for all worked answers; quiz to restart; topics to switch.
 
Question 1/10: Which description best fits a local area network (LAN)?
a) A network covering a limited area, such as one school site
b) Every computer connected to the internet
c) A network that cannot use cables
Type answer a, answer b, or answer c. (A single letter works too.)
review — read all questions & worked answers

Networks and internet protocols: questions, answers & explanations

This is the readable reference for the same 10 MCQs. Close this file to continue your quiz, or type quiz to start again.

1. Which description best fits a local area network (LAN)?

  1. a) A network covering a limited area, such as one school site
  2. b) Every computer connected to the internet
  3. c) A network that cannot use cables

Answer: a) A network covering a limited area, such as one school site

A LAN connects devices within a relatively limited geographical area. It can use wired connections, wireless connections, or both.

2. What does a router do?

  1. a) Convert every image into binary
  2. b) Forward packets between networks
  3. c) Store the only copy of every website

Answer: b) Forward packets between networks

A router forwards packets between networks, using routing information to choose a next step toward the destination.

3. Why can a message be split into packets for transmission?

  1. a) To guarantee that no errors can occur
  2. b) To remove the need for addresses
  3. c) To send it as smaller units that can be handled by the network

Answer: c) To send it as smaller units that can be handled by the network

Packets let a network handle a message in smaller units. Addressing and protocols help deliver and reconstruct the data.

4. What is a network protocol?

  1. a) An agreed set of rules for communication
  2. b) A type of computer screen
  3. c) A guarantee that a website is truthful

Answer: a) An agreed set of rules for communication

A protocol defines rules such as message format and how devices communicate. Both sides need compatible rules.

5. What is the role of an IP address?

  1. a) It records the user's password
  2. b) It identifies an interface for communication and routing on an IP network
  3. c) It specifies a screen's brightness

Answer: b) It identifies an interface for communication and routing on an IP network

IP addresses are logical network addresses used when delivering packets across IP networks.

6. A MAC address is associated with which component?

  1. a) A monitor's pixels
  2. b) A keyboard shortcut
  3. c) A network interface

Answer: c) A network interface

A MAC address identifies a network interface at the data-link layer. Its role differs from an IP address used for IP routing.

7. What does DNS help a browser find?

  1. a) An IP address associated with a domain name
  2. b) The user's Wi-Fi password
  3. c) Whether an article is factually correct

Answer: a) An IP address associated with a domain name

DNS resolves domain names to information such as IP addresses, helping a client locate the server it needs.

8. Which statement about TCP is correct?

  1. a) It deliberately discards all sequence information
  2. b) It can provide ordered delivery and retransmission of lost data
  3. c) It replaces the need for IP addresses

Answer: b) It can provide ordered delivery and retransmission of lost data

TCP uses mechanisms including sequence information, acknowledgements, and retransmission to provide a reliable, ordered byte stream.

9. What does HTTPS principally add to HTTP?

  1. a) Proof that every claim on the page is true
  2. b) A promise that the site has no tracking
  3. c) TLS protection for data in transit

Answer: c) TLS protection for data in transit

HTTPS uses TLS to protect the connection, including encryption in transit. This does not establish the truth of the page's content.

10. Which device lets a computer connect to a network?

  1. a) A network interface controller
  2. b) An arithmetic logic unit
  3. c) A read-only optical disc

Answer: a) A network interface controller

A network interface controller provides the interface through which a computer communicates on a network.

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