Computer Networks

Topics in this chapter

• Network Types and Topologies
• Transmission Media and Network Devices
• IP Addressing and Routing
• Network Protocols and Services
• Network Security and Performance
• Data Switching and Transmission

Cheat sheet

Practice questions

1. Question 1Q-5C3266

   Which networking device forwards data packets between different networks using their IP addresses?

   1. A.Hub
   2. B.Switch
   3. C.Router
   4. D.Repeater
   See the answer and solution
2. Question 2Q-25B55F

   A school uses a star topology in which all computers are connected to a central switch. What will happen if one computer's connecting cable is damaged, but the switch continues working?

   1. A.The entire network will stop working.
   2. B.Only the computer connected through the damaged cable will lose network access.
   3. C.All computers will receive duplicate data.
   4. D.The switch will automatically change the topology to a bus topology.
   See the answer and solution
3. Question 3Q-7CFA16

   Differentiate between circuit switching and packet switching. Also state why packet switching is commonly used on the Internet.

   See the answer and solution
4. Question 4Q-CF6C84

   Which service converts a human-readable domain name such as www.cbse.gov.in into its corresponding IP address?

   1. A.DNS
   2. B.FTP
   3. C.HTTP
   4. D.SMTP
   See the answer and solution
5. Question 5Q-AEC8EF

   A switch receives an Ethernet frame addressed to a computer connected to one of its ports. After learning the destination MAC address, what will the switch normally do?

   1. A.Send the frame only through the port associated with that MAC address
   2. B.Convert the frame into an optical signal and send it to every port
   3. C.Replace the destination MAC address with the destination IP address
   4. D.Discard the frame because switches do not use MAC addresses
   See the answer and solution