Computer Networks – Multiple Choice Questions (MCQs)

1. 109. What is SMTP?

   • A. Simple Mail Transfer Protocol
   • B. Secure Mail Transfer Protocol
   • C. System Mail Transfer Protocol
   • D. Standard Message Transfer Protocol

2. 110. What is DHCP?

   • A. Dynamic Host Configuration Protocol
   • B. Domain Host Configuration Protocol
   • C. Digital Host Control Protocol
   • D. Distributed Host Configuration Protocol

3. 111. What is the function of DHCP?

   • A. To automatically assign IP addresses to devices on a network
   • B. To manually configure IP addresses
   • C. To resolve domain names
   • D. To route network traffic

4. 112. What is a router?

   • A. A networking device that forwards data packets between networks
   • B. A device that connects devices within a local network
   • C. A device that amplifies network signals
   • D. A type of network cable

5. 113. What is a switch?

   • A. A networking device that forwards data packets based on MAC addresses within a local network
   • B. A device that routes packets between networks
   • C. A device that modulates and demodulates signals
   • D. A type of network software

6. 114. What is a hub?

   • A. A networking device that forwards all received data to all connected devices
   • B. A device that intelligently forwards packets
   • C. A device that filters network traffic
   • D. A type of network connector

7. 115. What is a firewall?

   • A. A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules
   • B. A device that amplifies network signals
   • C. A type of network cable
   • D. A protocol for secure communication

8. 116. What is a VPN?

   • A. Virtual Private Network
   • B. Very Public Network
   • C. Video Processing Network
   • D. Voice Protocol Network

9. 117. What is network congestion?

   • A. A condition in a network where data packets face delays due to network saturation
   • B. A physical damage to network cables
   • C. A software error in network devices
   • D. A security breach in the network

10. 118. What is Quality of Service (QoS)?

    • A. The overall performance of a network
    • B. Mechanisms to prioritize certain types of network traffic
    • C. The physical layout of the network
    • D. The security protocols used

11. 119. What is subnetting?

    • A. The process of dividing a network into smaller subnetworks
    • B. The process of combining multiple networks into one
    • C. The process of assigning IP addresses
    • D. The process of routing network traffic

12. 120. What is a subnet mask?

    • A. A numerical label assigned to each device in a TCP/IP network that distinguishes the network prefix and the host suffix
    • B. A type of network cable
    • C. A network security protocol
    • D. A routing table entry