Friday, August 1, 2025

TNPSC Computer Science :: MCQs: Network Devices

 50 multiple-choice questions (MCQs) covering the topic of Network Devices for TNPSC Group II Non-Interview Technical Posts. Each question includes the correct answer and a brief explanation, reflecting the level and style suitable for technical competitive exams:



MCQs: Network Devices

  1. Which device connects two different networks and directs data packets between them?
    A) Switch
    B) Router
    C) Hub
    D) Bridge
    Answer: B
    Explanation: A router connects and directs traffic between multiple networks.

  2. Which network device broadcasts incoming data to all its ports?
    A) Switch
    B) Router
    C) Hub
    D) Bridge
    Answer: C
    Explanation: A hub sends data to all ports, not just the destination.

  3. A device that operates at the Data Link layer (OSI Layer 2) is a:
    A) Router
    B) Switch
    C) Modem
    D) Firewall
    Answer: B
    Explanation: Switches function at OSI Layer 2.

  4. Which of the following provides wireless connectivity to a LAN?
    A) Switch
    B) Hub
    C) Access Point
    D) Bridge
    Answer: C
    Explanation: Access Points offer Wi-Fi access to LANs.

  5. Which network device converts digital data to analog for transmission over telephone lines?
    A) Firewall
    B) Switch
    C) Modem
    D) Router
    Answer: C
    Explanation: Modems modulate and demodulate signals.

  6. Which device extends the coverage of a network by re-amplifying signals?
    A) Modem
    B) Repeater
    C) Switch
    D) Access Point
    Answer: B
    Explanation: Repeaters regenerate weak signals.

  7. A device that connects two LAN segments and filters traffic is called:
    A) Router
    B) Bridge
    C) Hub
    D) Firewall
    Answer: B
    Explanation: Bridges connect segments and filter traffic.

  8. Which device primarily filters network traffic for security purposes?
    A) Access Point
    B) Hub
    C) Firewall
    D) Modem
    Answer: C
    Explanation: Firewalls manage/filter traffic based on security rules.

  9. A device that translates data between networks using different protocols is called a:
    A) Bridge
    B) Gateway
    C) Switch
    D) Repeater
    Answer: B
    Explanation: Gateways convert between different protocols.

  10. Which of these reduces network collisions in a LAN?
    A) Hub
    B) Switch
    C) Firewall
    D) Modem
    Answer: B
    Explanation: Switches send data only to target devices, reducing collisions.

  11. A point of access for wireless clients in a wired network is:
    A) Repeater
    B) Access Point
    C) Hub
    D) Router
    Answer: B

  12. Which network device uses MAC addresses to forward data?
    A) Switch
    B) Hub
    C) Router
    D) Modem
    Answer: A

  13. The main purpose of a network hub is to:
    A) Route data
    B) Boost signals
    C) Broadcast data to all ports
    D) Firewall protection
    Answer: C

  14. Which device separates broadcast domains in a network?
    A) Switch
    B) Router
    C) Repeater
    D) Hub
    Answer: B

  15. Which device connects computers in a star topology?
    A) Switch
    B) Bridge
    C) Hub
    D) Both A and C
    Answer: D
    Explanation: Both hubs and switches are used in star topologies.

  16. The OSI layer at which routers operate is:
    A) Physical
    B) Data Link
    C) Network
    D) Application
    Answer: C

  17. Which of these is NOT a function of a modern router?
    A) NAT translation
    B) Packet switching
    C) Data encryption
    D) Hard disk storage
    Answer: D

  18. A device placed at branch offices to connect to the main network is called:
    A) Access Point
    B) Hub
    C) Router
    D) Bridge
    Answer: C

  19. Switches can work at which OSI layers?
    A) Layer 1
    B) Layer 2
    C) Layer 3 (Multilayer)
    D) Both B and C
    Answer: D

  20. Which device increases the number of available ports in a network?
    A) Modem
    B) Switch
    C) Router
    D) Firewall
    Answer: B

  21. What does a modem do?
    A) Converts digital signals to analog and vice versa
    B) Routes traffic
    C) Broadcasts data
    D) Filters viruses
    Answer: A

  22. Which device maintains a table of MAC addresses for packet delivery?
    A) Hub
    B) Switch
    C) Modem
    D) Repeater
    Answer: B

  23. The primary device to connect a computer to an ISP is:
    A) Router
    B) Hub
    C) Switch
    D) Modem
    Answer: D

  24. A VLAN (Virtual LAN) can be created using:
    A) Hub
    B) Repeater
    C) Switch
    D) Modem
    Answer: C

  25. Which device is essential for network security?
    A) Access Point
    B) Firewall
    C) Hub
    D) Repeater
    Answer: B

  26. A repeater functions at OSI Layer:
    A) 1
    B) 2
    C) 3
    D) 4
    Answer: A

  27. Most home Wi-Fi routers combine the functions of:
    A) Only router
    B) Router and switch
    C) Router, switch, and access point
    D) Only access point
    Answer: C

  28. Which device is used to connect different physical media types?
    A) Switch
    B) Hub
    C) Media Converter
    D) Repeater
    Answer: C

  29. A device that keeps the network secure from unauthorized access:
    A) Firewall
    B) Switch
    C) VLAN
    D) Modem
    Answer: A

  30. Which allows only specific devices to communicate by checking MAC addresses?
    A) Switch
    B) Bridge
    C) Hub
    D) Router
    Answer: A

  31. Backbone networks in organizations are primarily built using:
    A) Hub
    B) Router
    C) Switch
    D) Repeater
    Answer: C

  32. A router typically has which of the following addresses?
    A) IP address
    B) MAC address
    C) Both A and B
    D) DNS address
    Answer: C

  33. The term ‘collision domain’ is associated with:
    A) Hub
    B) Bridge
    C) Switch
    D) All of the above
    Answer: D
    Explanation: All devices manage collision domains, but in different ways.

  34. Which device’s ports create separate collision domains but a shared broadcast domain?
    A) Switch
    B) Router
    C) Access Point
    D) Hub
    Answer: A

  35. A device used to connect a LAN to a WAN:
    A) Switch
    B) Router
    C) Bridge
    D) Repeater
    Answer: B

  36. What is the main limitation of a hub compared to a switch?
    A) Slower speed
    B) More traffic collisions
    C) Sends data to all ports
    D) All of the above
    Answer: D

  37. Network segmentation for performance is mostly done using:
    A) Hub
    B) Bridge
    C) Switch
    D) Modem
    Answer: C

  38. Which device regenerates and amplifies signals to prevent data loss?
    A) Repeater
    B) Switch
    C) Router
    D) Hub
    Answer: A

  39. Which network device is used for connecting network segments at the physical layer?
    A) Hub
    B) Repeater
    C) Switch
    D) Bridge
    Answer: B

  40. To isolate network traffic for security and performance, you would use:
    A) VLAN-capable switch
    B) Hub
    C) Repeater
    D) Dumb switch
    Answer: A

  41. The first network device to receive data from an external network is usually the:
    A) Switch
    B) Router
    C) Firewall
    D) Client PC
    Answer: B

  42. A hardware firewall is often positioned between:
    A) PC and switch
    B) Router and ISP
    C) Local network and the internet
    D) Printer and network
    Answer: C

  43. A wireless repeater is used to:
    A) Encrypt signals
    B) Extend Wi-Fi coverage
    C) Create new IP addresses
    D) Connect hubs
    Answer: B

  44. Network Address Translation (NAT) is performed by:
    A) Switch
    B) Router
    C) Modem
    D) Hub
    Answer: B

  45. Which device is essential for creating a secure VPN connection in a workplace?
    A) Hub
    B) Switch
    C) Router
    D) Gateway or Firewall
    Answer: D

  46. What is the main function of an access point?
    A) Manage wired connections
    B) Encrypt data
    C) Connect wireless devices to a network
    D) Work as firewall
    Answer: C

  47. Which device reduces the number of broadcast domains?
    A) Router
    B) Switch
    C) Access Point
    D) Repeater
    Answer: A

  48. Data packets are forwarded based on IP addresses by:
    A) Switch
    B) Bridge
    C) Router
    D) Hub
    Answer: C

  49. A network device that enables computers to communicate across different protocols:
    A) Bridge
    B) Router
    C) Gateway
    D) Switch
    Answer: C

  50. To interconnect two LANs with different architectures, use a:
    A) Bridge
    B) Switch
    C) Repeater
    D) Gateway
    Answer: D

These MCQs comprehensively cover the definitions, functions, and differences among network devices, aligning with the TNPSC technical syllabus and question style. 

TNPSC Computer Science :: MCQs: Network Devices

  50 multiple-choice questions (MCQs) covering the topic of   Network Devices   for TNPSC Group II Non-Interview Technical Posts. Each quest...