In this article MCQ on Computer Network we give the important computer network questions and answer in details.
MCQ on Computer Network:
1. What do users often use to access mainframe or supercomputer?
a. terminal
b. node
c. Desktop
d. handheld
Ans. A-Terminal
2. Which of the following exchanges information between computing devices?
a. Peripheral
b. expansion board
c. digital device
d. network
Ans. D-Network
3.In which network topology the components are connected by a single cable?
a. Bus Topology
b. Ring Topology
c. Star Topology
d. Mesh Topology
Ans. A – Bus Topology
4. What is made to share information between two or more computers?
a. router
b. Server
c. network
d. software
Ans. C – network
5. Which of the following is a small-single site network?
a. WAN (Wide Area Network)
b. LAN (Local Area Network)
c. MAN(Metropolitan Area Network)
d. RAM (Random Access Memory)
Ans. B – LAN (Local Area Network)
6. Through which network is information exchanged geographically in computers?
a. WAN
b. LAN
c. MAN
d. all of these
Ans. A – WAN
7. Computers connected to a local area network (LAN)
a. walk fast
b. can go online
c. can email
d. Can share information or peripheral devices
Ans. D – Can share information or peripheral devices
8. What is considered the world’s first computer network?
a. Internet
b. NSF Net
c. ARPANET
d. VNet
Ans. C – ARPANET
9. When many computers have to be connected at one place, what is it called?
a. WAN
b. INFINITE
c. WON (Wireless Optical Network)
d. LAN
Ans. D – LAN
10. ____ is a central computer that holds a collection of data and programs for many personal computers, work stations, and other computers?
a. super computer
b. mini computer
c. laptop
d. Server
Ans. D – Server
MCQ on Computer Network:
11. Which of the following is a small network?
a. LAN
b. M.A.N.
c. WAN
d. RAM
Ans. A – LAN
12. What is the name of the network topology in which every possible node has a bidirectional link?
a. ring topology
b. star topology
c. bus topology
d. mesh topology
Ans. D – mesh topology
13. What is the device called which connects to the network without cable?
a. distributed
b. Wireless
c. centralized
d. Open Source
Ans. B – Wireless
14. What is Protocol?
a. a set of rules
b. example of input device
c. a part of the cpu
d. compiler
Ans. A – a set of rules
15. What is a terminal?
a. A device that supplies power to a computer
b. A point at which data enters or leaves a computer
c. last instruction of a program
d. none of these
Ans. B – A point at which data enters or leaves a computer
16. Office LANs which are geographically dispersed can be connected using corporate ____?
a. WAN (Wide Area Network)
b. DAN (Desk Area Network)
c. CAN (Campus Area Network)
d. MAN(Metropolitan Area Network)
Ans. A – WAN (Wide Area Network)
17. What does LAN mean in networking?
a. Local Area Network
b. Long Access Network
c. Large Area Network
d. Local Access Node
Answer: a. Local Area Network
18. Which of the following protocols is used to send and receive email messages?
a. http
b. ftp
c. POP3
d. TCP
Answer: c. POP3
19. What is the purpose of IP Address in networking?
a. To identify a device on a network
b. To encrypt data transmissions
c. To manage network security
d. To establish VPN connections
Answer: a. To identify a device on a network
20. Which network topology forms a closed-loop where each device is connected to exactly two other devices?
a. Star Topology
b. Bus Topology
c. Ring Topology
d. Mesh Topology
Answer: c. Ring Topology
21. Which protocol is used to retrieve email messages from a mail server to a client computer?
a. smtp
b. http
c. IMAP
d. ftp
Answer: c. IMAP
22. What does DNS resolve in networking?
a. Domain names to IP addresses
b. IP addresses to domain names
c. Encrypted data transmissions
d. Network security issues
Answer: a. Domain names to IP addresses
23. Which layer of the OSI model is responsible for data compression and decompression?
a. Physical Layer
b. Data Link Layer
c. Presentation Layer
d. Transport Layer
Answer: c. Presentation Layer
24. What is the function of router in network?
a. To connect devices within a LAN
b. To connect a LAN to the Internet
c. To switch data packets within a LAN
d. To filter network traffic
Answer: b. To connect a LAN to the Internet
MCQ on Computer Network:
25. Which protocol is used to securely transfer files between a local computer and a remote server?
a. http
b. ftp
c. smtp
d. POP3
Answer: b. ftp
26. Which of the following devices works on the Physical Layer (Layer 1) of the OSI model?
a. Router
b. hub
c. switch
d. Firewall
Answer: b. hub
27. What is the primary function of ARP (Address Resolution Protocol) in networking?
a. To map IP addresses to MAC addresses
b. To route packets across networks
c. To establish secure VPN connections
d. To regulate network traffic flow
Answer: a. To map IP addresses to MAC addresses
28. Which networking component is responsible for connecting the local network to the Internet?
a. Modem
b. Router
c. Firewall
d. switch
Answer: b. Router
29. What is the purpose of subnet mask in IP networking?
a. To hide the IP address of a device
b. To determine the network portion of an IP address
c. To encrypt network traffic
d. To assign IP addresses dynamically
Answer: b. To determine the network portion of an IP address
30. What is the maximum number of IP addresses in an IPv4 subnet with a subnet mask of 255.255.255.240?
a. 4
b. 8
c. 16
d. 32
Answer: c. 16
31. Which protocol is responsible for sending email over the Internet?
a. ftp
b. http
c. smtp
d. POP3
Answer: c. smtp
32. What is the purpose of firewall in network security?
a. To encrypt data transmissions
b. To filter and control network traffic
c. To resolve domain names to IP addresses
d. To establish VPN connections
Answer: b. To filter and control network traffic
33. What does ICMP mean in networking?
a. Internet Control Message Protocol
b. Internet Communication and Mapping Protocol
c. Internet Configuration Management Protocol
d. Internet Connection Monitoring Protocol
Answer: a. Internet Control Message Protocol
34. Which network topology connects all devices to a central hub or switch?
a. Ring Topology
b. Mesh Topology
c. Star Topology
d. Bus Topology
Answer: c. Star Topology
35. What is the purpose of VPN (Virtual Private Network) in networking?
a. To broadcast network traffic to all devices on a subnet.
b. To create a secure, encrypted connection over the Internet.
c. To filter and control network traffic
d. To map domain names to IP addresses
Answer: b. To create a secure, encrypted connection over the Internet.
36. Which port number is usually associated with HTTPS (Hypertext Transfer Protocol Secure) protocol?
a. 80
b. 443
c. 25
d. 53
Answer: b. 443
MCQ on Computer Network:
37. What is the purpose of QoS (Quality of Service) in networking?
a. To secure network communications
b. To prioritize and manage network traffic
c. To resolve domain names to IP addresses
d. To establish VPN connections
Answer: b. To prioritize and manage network traffic
38. Which of the following is a private IP address?
a. 192.168.1.1
b. 203.129.22.15
c. 172.16.32.8
d. 209.143.58.7
Answer: a. 192.168.1.1
39. What is the maximum theoretical data transfer rate of a Gigabit Ethernet connection?
a. 100Mbps
b. 1Gbps
c. 10Gbps
d. 100Gbps
Answer: b. 1Gbps
40. Which OSI Model Layer is responsible for ensuring that data is delivered reliably and in the correct order?
a. Physical Layer
b. Data Link Layer
c. Transport Layer
d. Network Layer
Answer: c. Transport Layer
41. What is VLAN (Virtual Local Area Network)?
a. A physical network segment
b. A wireless access point
c. A logical network segment within a physical network
d. A network switch
Answer: c. A logical network segment within a physical network
42. Which protocol is used for secure file transfer over the network?
a. http
b. ftp
c. smtp
d. ICMP
Answer: b. ftp
43. What is the primary function of proxy server in networking?
a. To filter and control network traffic
b. To map domain names to IP addresses
c. To establish secure VPN connections
d. To encrypt data transmissions
Answer: a. To filter and control network traffic
44. Which of the following is not a top-level domain (TLD) in DNS (Domain Name System)?
a. .com
b. .org
c. .net
d. .html
Answer: d. .html
45. What is the purpose of NAT (Network Address Translation) in a home router?
a. To assign IP addresses to devices dynamically
b. To hide internal IP addresses from external networks
c. To encrypt network traffic
d. To filter and control network traffic
Answer: b. To hide internal IP addresses from external networks
46. What is MAC Address in networking?
a. The physical address of a network device
b. The IP address of a network device
c. The URL of a website
d. The email address of a user
Answer: a. The physical address of a network device
47. What is the primary function of a DNS server?
a. To filter and control network traffic
b. To assign IP addresses to devices dynamically
c. To map domain names to IP addresses
d. To establish secure VPN connections
Answer: c. To map domain names to IP addresses
48. In wireless networks, which technology is used to secure and encrypt data transmission?
a. WEP (Wired Equivalent Privacy)
b. FTP (File Transfer Protocol)
c. HTTPS (Hypertext Transfer Protocol Secure)
d. WPA2 (Wi-Fi Protected Access 2)
Answer: d. WPA2 (Wi-Fi Protected Access 2)
49. What is the purpose of ICMP Destination Unreachable message in networking?
a. To indicate that a host or network is unreachable.
b. To acknowledge the receipt of a TCP packet
c. To request an IP address from a DHCP server
d. To establish a secure VPN connection
Answer: a. To indicate that a host or network is unreachable.
50. What is the primary purpose of BGP (Border Gateway Protocol) in the context of Internet?
a. To secure network communications
b. To map domain names to IP addresses
c. To route traffic between autonomous systems (ASes)
d. To prioritize network traffic
MCQ on Computer Network:
Answer: c. To route traffic between autonomous systems (ASes)
MCQ on Computer Network:
51. What is the primary objective of the OSI (Open Systems Interconnection) model?
a. To define the architecture of modern computer networks
b. To standardize networking protocols and communication
c. To develop hardware components for networking
d. To manage network security
Answer: b. To standardize networking protocols and communication
52. Which layer of the OSI model is responsible for routing and forwarding packets across different networks?
a. Physical Layer
b. Data Link Layer
c. Network Layer
d. Transport Layer
Answer: c. Network Layer
53. What is the purpose of DNS in computer network?
a. To secure network communications
b. To map IP addresses to domain names
c. To regulate network traffic flow
d. To encrypt data transmissions
Answer: b. To map IP addresses to domain names
54. Which network topology connects all the devices in a daisy-chain fashion, where one device is connected to another in a linear manner?
a. Star Topology
b. Bus Topology
c. Ring Topology
d. Mesh Topology
Answer: b. Bus Topology
55. In TCP/IP networking, what is the primary function of TCP (Transmission Control Protocol)?
a. Error detection and correction
b. Reliable data transmission
c. Address resolution
d. packet routing
Answer: b. Reliable data transmission
56. Which network device works at the data link layer (Layer 2) of the OSI model and filters traffic based on MAC address?
a. Router
b. hub
c. switch
d. Firewall
Answer: c. switch
57. What does DHCP mean in the context of computer networking?
a. Dynamic Host Configuration Protocol
b. Data Handling and Control Protocol
c. Domain Host Configuration Helper
d. Digital High-Speed Communication Protocol
Answer: a. Dynamic Host Configuration Protocol
58. Which device is used to connect multiple network devices together within a local area network?
a. Router
b. Modem
c. hub
d. Firewall
Answer: c. hub
59. What is the primary purpose of NAT (Network Address Translation) in networking?
a. To encrypt network traffic
b. To hide internal IP addresses from external networks
c. To establish secure VPN connections
d. To manage DNS resolution
Answer: b. To hide internal IP addresses from external networks
60. Which protocol is commonly used for secure remote shell access to network devices and servers?
a. smtp
b. http
c. ssh
d. ftp
Answer: c. ssh
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