Candidates can test their knowledge with these computer network MCQs to reinforce their understanding of key concepts and principles in the field.
1. Which layer of the OSI model is associated with error detection and correction?
A) Network Layer
B) Transport Layer
C) Data Link Layer
D) Application Layer
Answer: C) Data Link Layer
2. What is the primary function of a router?
A) To connect devices within the same network
B) To route data between different networks
C) To manage network traffic
D) To amplify signals
Answer: B) To route data between different networks
3. Which protocol is used to send email?
A) HTTP
B) FTP
C) SMTP
D) SNMP
Answer: C) SMTP
4. In which topology does each node connect to a central hub?
A) Star Topology
B) Bus Topology
C) Ring Topology
D) Mesh Topology
Answer: A) Star Topology
5. What does the acronym DHCP stand for?
A) Dynamic Host Configuration Protocol
B) Data Host Control Protocol
C) Direct Host Communication Protocol
D) Domain Host Control Protocol
Answer: A) Dynamic Host Configuration Protocol
6. Which of the following IP addresses is a private IP address?
A) 192.168.1.1
B) 172.16.0.1
C) 10.0.0.1
D) All of the above
Answer: D) All of the above
7. What is the maximum length of a CAT5e cable?
A) 50 meters
B) 100 meters
C) 200 meters
D) 300 meters
Answer: B) 100 meters
8. Which layer of the OSI model handles data encryption?
A) Physical Layer
B) Network Layer
C) Transport Layer
D) Presentation Layer
Answer: D) Presentation Layer
9. What is the main purpose of NAT (Network Address Translation)?
A) To secure data
B) To hide internal IP addresses
C) To manage bandwidth
D) To prioritize traffic
Answer: B) To hide internal IP addresses
10. Which protocol is used for secure file transfer?
A) FTP
B) SFTP
C) HTTP
D) Telnet
Answer: B) SFTP
11. What does SSL stand for?
A) Secure Socket Layer
B) Security System Layer
C) Simple Socket Layer
D) Secure System Layer
Answer: A) Secure Socket Layer
12. In a TCP/IP model, which layer is equivalent to the OSI's Transport Layer?
A) Internet Layer
B) Application Layer
C) Transport Layer
D) Network Access Layer
Answer: C) Transport Layer
13. Which device is used to connect different networks and filter traffic?
A) Switch
B) Hub
C) Router
D) Repeater
Answer: C) Router
14. What is the default subnet mask for a Class C IP address?
A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255
Answer: C) 255.255.255.0
15. Which of the following is a benefit of using a VPN?
A) Increased speed
B) Enhanced security
C) Reduced latency
D) Free Internet access
Answer: B) Enhanced security
16. What type of addressing uses MAC addresses?
A) Network Layer
B) Transport Layer
C) Data Link Layer
D) Application Layer
Answer: C) Data Link Layer
17. What is the main role of a firewall?
A) To speed up the network
B) To filter incoming and outgoing traffic
C) To increase network capacity
D) To connect different networks
Answer: B) To filter incoming and outgoing traffic
18. Which topology allows for the most redundancy?
A) Star
B) Ring
C) Mesh
D) Bus
Answer: C) Mesh
19. Which layer in the OSI model is responsible for establishing, managing, and terminating connections?
A) Session Layer
B) Transport Layer
C) Application Layer
D) Data Link Layer
Answer: A) Session Layer
20. What does the acronym WAN stand for?
A) Wide Area Network
B) Wireless Area Network
C) Wide Access Network
D) Web Area Network
Answer: A) Wide Area Network
21. Which of the following is a connection-oriented protocol?
A) UDP
B) IP
C) TCP
D) ICMP
Answer: C) TCP
22. What type of network uses a single central cable for all devices?
A) Star
B) Ring
C) Bus
D) Mesh
Answer: C) Bus
23. Which device operates at the OSI model's Network Layer?
A) Switch
B) Hub
C) Router
D) Repeater
Answer: C) Router
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Explore Program24. What is the purpose of ARP (Address Resolution Protocol)?
A) To translate IP addresses to MAC addresses
B) To resolve domain names to IP addresses
C) To route packets
D) To manage IP address allocation
Answer: A) To translate IP addresses to MAC addresses
25. Which command is used to test connectivity between two network devices?
A) ping
B) tracert
C) netstat
D) ipconfig
Answer: A) ping
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