Std XII Computer Science: Unit 2 - Computer Networks - Network Devices
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Questions and Answers

What is the primary function of a modem?

  • Manage network traffic and prevent data collisions
  • Provide security and encryption for data transfer
  • Convert digital data into analog data for transmission (correct)
  • Enhance the Wi-Fi signal strength

Which network device is used to regenerate and retransmit signals to extend the reach of a network?

  • Router
  • Repeater (correct)
  • Bridge
  • Switch

What is the purpose of a bridge in a network?

  • Broadcast data packets to all devices in the network
  • Provide IP addresses to devices in the network
  • Boost the signal strength for wireless devices
  • Connect multiple networks together and manage traffic between them (correct)

Which network device is responsible for determining the best path for data packets to reach their destination?

<p>Router (D)</p> Signup and view all the answers

In a network, what does a repeater help overcome?

<p>Signal attenuation issues (A)</p> Signup and view all the answers

Which network device is primarily responsible for determining which devices can communicate within the same network?

<p>Switch (A)</p> Signup and view all the answers

What is the primary purpose of a network repeater?

<p>To regenerate and extend the distance of a signal (C)</p> Signup and view all the answers

How does a bridge differ from a router in terms of network connectivity?

<p>A bridge connects networks with the same protocol, while a router connects networks with different protocols (A)</p> Signup and view all the answers

What is the primary factor that causes signal attenuation in physical media like Ethernet or WiFi?

<p>Energy dissipated in conductor resistance and dielectric losses (A)</p> Signup and view all the answers

What is the main advantage of a router over a hub or switch?

<p>Routers can connect networks with different protocols (C)</p> Signup and view all the answers

How does a bridge determine which packets to allow across the network?

<p>By checking the physical destination address of the packet (C)</p> Signup and view all the answers

What is the primary purpose of a router in a network?

<p>To connect different types of networks (D)</p> Signup and view all the answers

What is the main purpose of a routing table in a router?

<p>To calculate the shortest path for data packets to reach their destination (D)</p> Signup and view all the answers

What is the primary function of a network gateway?

<p>To establish an intelligent connection between dissimilar networks (B)</p> Signup and view all the answers

Which of the following is a characteristic of a router?

<p>It can provide connectivity between enterprises and the Internet (D)</p> Signup and view all the answers

What is the role of a proxy server in a network gateway?

<p>To appear as a server without actually being one (B)</p> Signup and view all the answers

What is the purpose of a firewall in a network gateway?

<p>To prevent unauthorized access to or from a private network (A)</p> Signup and view all the answers

Which of the following devices is responsible for amplifying and retransmitting a signal to overcome signal attenuation?

<p>Repeater (C)</p> Signup and view all the answers

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