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.

This CBSE Class 12 Computer Science practice quiz has 12 multiple-choice questions on Computer Networks, and 12 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz 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.
   Show answer

   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
   Show answer

   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
   Show answer

   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.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What does TCP/IP stand for?
2. What is the purpose of a subnet mask?
3. What is the difference between a MAC address and an IP address?
4. Explain the concept of network congestion.
5. What is a VPN and how does it enhance network security?
6. Discuss various network security threats and their mitigation strategies.
7. Compare and contrast different routing protocols (e.g., RIP, OSPF, BGP) considering their features, scalability, and applications.

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