Computer Networks MCQs

#1. What is the purpose of a router in a computer network?

To connect different networks and forward data between them

To filter spam emails

To store data in a centralized location

To display web pages in a browser

None of the above

#2. Which protocol is used for secure communication over a computer network?

FTP

HTTP

SSL/TLS

POP

SMTP

#3. What is the purpose of an IP address in a computer network?

To identify a device on the network

To determine the color scheme of a website

To play multimedia files

To manage printer settings

To send emails

#4. Which device is used to connect multiple computers in a local area network (LAN)?

Router

Switch

Modem

Hub

Firewall

#5. What is the purpose of DNS (Domain Name System) in a computer network?

To convert human-readable domain names into IP addresses

To secure wireless networks

To compress data for faster transmission

To filter websites

To encrypt emails

#6. Which network topology connects all devices in a linear sequence?

Star

Bus

Ring

Mesh

Tree

#7. What does LAN stand for in computer networking?

Local Area Network

Long-range Access Network

Large-scale Area Network

Low-latency Access Network

Limited Area Network

#8. Which protocol is used for sending and receiving email messages over the internet?

SMTP

HTTP

FTP

DNS

POP

#9. What is the purpose of a firewall in a computer network?

To protect against unauthorized access and malicious activity

To enhance download speed

To store files in the cloud

To convert analog signals to digital

To print documents

#10. Which layer of the OSI model is responsible for ensuring error-free data transmission?

Physical layer

Data link layer

Network layer

Transport layer

Presentation layer

#11. Which device connects a local network to the internet?

Modem

Router

Switch

Firewall

Hub

#12. Which networking device operates at the Data Link layer of the OSI model and uses MAC addresses to forward data packets?

Switch

Router

Hub

Modem

Firewall

#13. In a wireless network, what does SSID stand for?

Service Set Identifier

Security Set Identifier

System Set Identifier

Service Security Identifier

System Security Identifier

#14. What is the purpose of NAT (Network Address Translation) in a router?

It allows multiple devices on a local network to share a single public IP address

It encrypts data for secure transmission

It filters incoming emails

It converts analog signals to digital

It manages printer settings

#15. Which protocol is used for transferring files over the internet?

FTP

SMTP

HTTP

POP

DNS

#16. Which type of network provides internet connectivity to devices within a limited geographic area, like a coffee shop or airport?

WLAN (Wireless Local Area Network)

LAN (Local Area Network)

WAN (Wide Area Network)

MAN (Metropolitan Area Network)

PAN (Personal Area Network)

#17. What is the purpose of a subnet mask in IP networking?

It defines the network portion of an IP address and the host portion

It encrypts data for secure transmission

It filters incoming emails

It converts analog signals to digital

It manages printer settings

#18. What is the maximum transmission speed of a standard Ethernet connection in bits per second?

1000 Mbps (1 Gigabit per second)

100 Mbps (100 Megabits per second)

10 Mbps (10 Megabits per second)

1 Gbps (1 Gigabit per second)

10 Gbps (10 Gigabits per second)

#19. What is the purpose of a DNS cache in a computer system?

It stores recently accessed DNS records to speed up future lookups

It encrypts data for secure transmission

It filters incoming emails

It converts analog signals to digital

It manages printer settings

#20. In a network, what does the term “bandwidth” refer to?

The maximum data transfer rate of a network connection

The physical width of a network cable

The distance between devices on a network

The number of devices connected to a network

The speed of data transmission on a network

#1. What is the purpose of a router in a computer network?

#2. Which protocol is used for secure communication over a computer network?

#3. What is the purpose of an IP address in a computer network?

#4. Which device is used to connect multiple computers in a local area network (LAN)?

#5. What is the purpose of DNS (Domain Name System) in a computer network?

#6. Which network topology connects all devices in a linear sequence?

#7. What does LAN stand for in computer networking?

#8. Which protocol is used for sending and receiving email messages over the internet?

#9. What is the purpose of a firewall in a computer network?

#10. Which layer of the OSI model is responsible for ensuring error-free data transmission?

#11. Which device connects a local network to the internet?

#12. Which networking device operates at the Data Link layer of the OSI model and uses MAC addresses to forward data packets?

#13. In a wireless network, what does SSID stand for?

#14. What is the purpose of NAT (Network Address Translation) in a router?

#15. Which protocol is used for transferring files over the internet?

#16. Which type of network provides internet connectivity to devices within a limited geographic area, like a coffee shop or airport?

#17. What is the purpose of a subnet mask in IP networking?

#18. What is the maximum transmission speed of a standard Ethernet connection in bits per second?

#19. What is the purpose of a DNS cache in a computer system?

#20. In a network, what does the term “bandwidth” refer to?

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