Computer Networks Quiz - CBSE Class 12 Computer Science

Free practice quiz: Computer Networks (CBSE Class 12 Computer Science). 12 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is NOT a type of network topology?

   1. Star
   2. Bus
   3. Ring
   4. Cloud
   Show answer

   Answer: D. Cloud

   Star, Bus, and Ring are standard network topologies. Cloud refers to cloud computing, not a network topology.

2. Explain the difference between a router and a switch.

   1. A router connects networks, a switch connects devices on the same network.
   2. A router connects devices on the same network, a switch connects networks.
   3. Both connect devices on the same network.
   4. Both connect different networks.
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   Answer: A. A router connects networks, a switch connects devices on the same network.

   Routers forward data packets between networks, while switches forward data packets within a single network.

3. Describe the function of a DNS server.

   1. Translates domain names into IP addresses
   2. Stores web pages
   3. Manages network security
   4. Controls network traffic
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   Answer: A. Translates domain names into IP addresses

   DNS servers translate human-readable domain names (e.g., google.com) into machine-readable IP addresses.

4. What are the different layers of the OSI model?

   1. Physical, Data Link, Network, Transport, Session, Presentation, Application
   2. Physical, Data Link, Internet, Transport, Session, Presentation, Application
   3. Physical, Data Link, Network, Transport, Session, Application
   4. Physical, Network, Transport, Application
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   Answer: A. Physical, Data Link, Network, Transport, Session, Presentation, Application

   The OSI model has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

5. Explain the concept of network security protocols and their importance.

   1. They are rules and standards to secure network communication and prevent unauthorized access.
   2. They are used to increase network speed.
   3. They are used to manage network traffic.
   4. They are used to troubleshoot network issues.
   Show answer

   Answer: A. They are rules and standards to secure network communication and prevent unauthorized access.

   Network security protocols (e.g., TLS/SSL, IPSec) are crucial for protecting data integrity and confidentiality during network communication.

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