Lesson 4.9.3.1

4.9.3.1 The Internet and how it works Quiz: AQA Computer Science, Unit 9

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.9.3.1, The Internet and how it works: 20 multiple choice questions for the AQA Computer Science (7517), Unit 9: Fundamentals of communication and networking, written with Revision Ninja.

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The 20 questions

  1. What term describes a self-contained block of data sent across a network?

    • Protocol
    • Packet
    • Bitstream
    • Circuit

  2. Which method breaks data into chunks that travel independently across a network?

    • Packet switching
    • Message switching
    • Line switching
    • Circuit switching

  3. Which hardware device forwards packets between different networks using IP addresses?

    • Hub
    • Router
    • Switch
    • Repeater

  4. What device connects two networks that use different communication protocols?

    • Network card
    • Bridge
    • Gateway
    • Switch

  5. Which two main components make up a network data packet?

    • Sender and receiver
    • IP and MAC
    • Source and route
    • Header and payload

  6. What specifies the location of a resource on the web and the protocol to access it?

    • URL
    • FQDN
    • IP address
    • MAC address

  7. What type of domain name gives the absolute, complete specification of a host location?

    • FQDN
    • TLD
    • URL
    • IP address

  8. What human-readable text address maps directly to a server's IP address?

    • Network ID
    • MAC address
    • Protocol name
    • Domain name

  9. What service translates human-readable domain names into numerical IP addresses?

    • Network Address Translation
    • Simple Mail Transfer
    • Dynamic Host Configuration
    • Domain Name System

  10. In what structural form are domain names organised across the Internet?

    • Flat index
    • Linear list
    • Hierarchical tree
    • Mesh network

  11. What organisation allocates and manages unique IP addresses and domain names globally?

    • Internet registry
    • Network gateway
    • Internet service provider
    • Web host server

  12. In the URL https://www.example.org/news/page1.html, which part is the domain name?

    • /news/page1.html
    • www.example.org
    • https
    • page1.html

  13. In the URL https://www.example.org/news/page1.html, which part identifies the protocol?

    • www.example.org
    • https
    • news
    • page1.html

  14. Why must a web browser query the DNS before connecting to a website?

    • Allocate port numbers
    • Check SSL validity
    • Encrypt payload data
    • Find IP address

  15. How do routers determine where to forward an incoming packet?

    • Using routing tables
    • Broadcasting to all
    • Querying DNS servers
    • Reading payload data

  16. The URL http://www.example.com/a/b/c.html contains a path. How many path segments does it have?

    • 4
    • 3
    • 2
    • 1

  17. What relationship exists between domain names and IP addresses?

    • Strictly one-to-many
    • Strictly many-to-one
    • One-to-one
    • Many-to-many

  18. What core action does a router take with a packet for a remote network?

    • Encrypts payload
    • Compresses header
    • Deletes packet
    • Forwards packet

  19. Why can packets from the same message arrive out of order at their destination?

    • Different routing paths
    • Corrupted MAC addresses
    • Single path congestion
    • Sequential byte counts

  20. Which packet header field is primarily used by routers to direct data across the Internet?

    • Source IP address
    • Destination MAC address
    • Destination IP address
    • Source port number

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