MCQ questions and answers of computer network : In the digital age computer network is the backbone of communication. In this article, we are looking at 50+ MCQ questions and answers to computer networks. If you like this article then say thank you in the comments.
Contents
MCQ questions and answers of computer network
What is a computer network?
a) A group of interconnected computers
b) A single computer
c) A computer program
d) A computer virus
Answer: a) A group of interconnected computers
What does TCP stand for in networking?
a) Transmission Control Protocol
b) Transfer Control Protocol
c) Transport Control Protocol
d) Terminal Control Protocol
Answer: a) Transmission Control Protocol
Which layer of the OSI model is responsible for routing and forwarding data packets?
a) Physical layer
b) Data link layer
c) Network layer
d) Transport layer
Answer: c) Network layer
What is the purpose of ARP (Address Resolution Protocol)?
a) To resolve domain names to IP addresses
b) To resolve IP addresses to MAC addresses
c) To establish a secure connection
d) To route data packets
Answer: b) To resolve IP addresses to MAC addresses
Which device is used to connect multiple network segments and make them operate as a single network?
a) Router
b) Bridge
c) Hub
d) Switch
Answer: d) Switch
Which protocol is used for secure communication over the internet?
a) HTTP
b) FTP
c) SSH
d) SMTP
Answer: c) SSH
What is the maximum length of an IPv4 address?
a) 16 bits
b) 32 bits
c) 64 bits
d) 128 bits
Answer: b) 32 bits
Which of the following topologies is known for its high fault tolerance?
a) Star
b) Bus
c) Ring
d) Mesh
Answer: d) Mesh
Which protocol is used for sending emails?
a) FTP
b) HTTP
c) SMTP
d) POP3
Answer: c) SMTP
What does DNS stand for?
a) Dynamic Network System
b) Domain Name System
c) Data Network Service
d) Digital Naming Service
Answer: b) Domain Name System
In computer networking, what does LAN stand for?
a) Long Area Network
b) Local Access Network
c) Large Area Network
d) Local Area Network
Answer: d) Local Area Network
Which layer of the OSI model deals with error detection and correction?
a) Physical layer
b) Data link layer
c) Network layer
d) Presentation layer
Answer: b) Data link layer
What is the purpose of a firewall in a network?
a) To filter out spam emails
b) To block unauthorized access and protect the network
c) To route data packets
d) To establish secure connections
Answer: b) To block unauthorized access and protect the network
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
What is the primary purpose of NAT (Network Address Translation)?
a) To convert public IP addresses to private IP addresses
b) To convert private IP addresses to public IP addresses
c) To encrypt network traffic
d) To block unwanted websites
Answer: b) To convert private IP addresses to public IP addresses
Which wireless networking standard is commonly known as “Wi-Fi”?
a) IEEE 802.3
b) IEEE 802.11
c) IEEE 802.15
d) IEEE 802.16
Answer: b) IEEE 802.11
In networking, what is a MAC address?
a) A unique 32-bit address assigned to each device on the internet
b) A unique 64-bit address assigned to each device on the internet
c) A physical hardware address that identifies a network adapter
d) A domain name that maps to an IP address
Answer: c) A physical hardware address that identifies a network adapter
What is the purpose of a DNS server?
a) To store email messages
b) To convert IP addresses to domain names
c) To manage network security
d) To establish VPN connections
Answer: b) To convert IP addresses to domain names
Which protocol is used for securely transferring files over the internet?
a) HTTP
b) SMTP
c) FTP
d) TCP
Answer: c) FTP
What is the role of a gateway in a network?
a) To filter out unwanted emails
b) To provide a central point for network connections and data traffic
c) To encrypt data packets
d) To create backups of network data
Answer: b) To provide a central point for network connections and data traffic
Which of the following is an example of a public IP address?
a) 192.168.1.1
b) 10.0.0.1
c) 172.16.0.1
d) 203.0.113.10
Answer: d) 203.0.113.10
Which network device operates at the data link layer and forwards data based on MAC addresses?
a) Router
b) Switch
c) Firewall
d) Hub
Answer: b) Switch
Which OSI layer is responsible for data encryption and decryption?
a) Data link layer
b) Network layer
c) Transport layer
d) Presentation layer
Answer: d) Presentation layer
Which network topology connects all devices in a linear fashion, but a break in the cable can disrupt the entire network?
a) Bus
b) Star
c) Ring
d) Mesh
Answer: a) Bus
What is the purpose of a subnet mask?
a) To identify the network portion of an IP address
b) To identify the host portion of an IP address
c) To convert IP addresses to domain names
d) To establish secure VPN connections
Answer: a) To identify the network portion of an IP address
50+ MCQ questions and answers of computer network
Which protocol is used for retrieving email messages from a mail server?
a) SMTP
b) POP3
c) FTP
d) HTTP
Answer: b) POP3
What is the maximum data rate of a standard Ethernet connection (without considering Gigabit Ethernet or higher standards)?
a) 100 Mbps
b) 1 Gbps
c) 10 Mbps
d) 1000 Mbps
Answer: a) 100 Mbps
In networking, what is a proxy server used for?
a) To block unwanted websites
b) To convert IP addresses to domain names
c) To enhance network security and privacy
d) To manage email messages
Answer: c) To enhance network security and privacy
What is the purpose of ICMP (Internet Control Message Protocol)?
a) To encrypt network traffic
b) To resolve domain names to IP addresses
c) To manage network security
d) To send error and control messages between network devices
Answer: d) To send error and control messages between network devices
Which of the following is not a network topological characteristic?
a) Reliability
b) Scalability
c) Performance
d) Compatibility
Answer: d) Compatibility
What is a DMZ in the context of network security?
a) A Demilitarized Zone where network traffic is unrestricted
b) A Database Management Zone for storing critical data
c) A Dedicated Mail Zone for email communication
d) A Data Migration Zone for backups
Answer: a) A Demilitarized Zone where network traffic is unrestricted
What protocol is commonly used for secure web browsing (HTTPS)?
a) HTTP
b) FTP
c) SMTP
d) SSL/TLS
Answer: d) SSL/TLS
Which of the following is a private IP address range?
a) 192.0.2.0 to 192.0.2.255
b) 203.0.113.0 to 203.0.113.255
c) 172.16.0.0 to 172.31.255.255
d) 198.51.100.0 to 198.51.100.255
Answer: c) 172.16.0.0 to 172.31.255.255
What does the acronym VPN stand for in networking?
a) Virtual Private Network
b) Very Private Network
c) Virtual Public Network
d) Very Public Network
Answer: a) Virtual Private Network
Which protocol is used for sending and receiving email messages?
a) HTTP
b) FTP
c) SMTP
d) POP3
Answer: c) SMTP
What is the purpose of a router in a network?
a) To filter out unwanted emails
b) To switch data packets between devices on the same network
c) To establish secure VPN connections
d) To route data packets between different networks
Answer: d) To route data packets between different networks
In a client-server network model, what is the role of the server?
a) To request data from clients
b) To provide resources and services to clients
c) To store email messages
d) To manage network security
Answer: b) To provide resources and services to clients
What is the purpose of a MAC address in networking?
a) To identify a device on the internet
b) To identify a device on a local network
c) To identify a website’s IP address
d) To manage network security
Answer: b) To identify a device on a local network
What is the purpose of a DHCP server in a network?
a) To resolve domain names to IP addresses
b) To provide dynamic IP addresses to devices on the network
c) To encrypt network traffic
d) To establish secure VPN connections
Answer: b) To provide dynamic IP addresses to devices on the network
Which of the following is not a common wireless encryption protocol?
a) WEP
b) WPA
c) SSL
d) WPA2
Answer: c) SSL
What does SSID stand for in the context of wireless networks?
a) Secure System Identifier
b) Server-Client Identifier
c) Service Set Identifier
d) Static Security Identifier
Answer: c) Service Set Identifier
Which device connects a local network to the internet and allows multiple devices to share a single public IP address?
a) Hub
b) Switch
c) Modem
d) Router
Answer: d) Router
What is the purpose of a VLAN (Virtual LAN)?
a) To create virtual firewalls
b) To segment a physical network into multiple logical networks
c) To manage email messages
d) To establish secure VPN connections
Answer: b) To segment a physical network into multiple logical networks
Which protocol is commonly used for remotely accessing and managing network devices such as routers and switches?
a) Telnet
b) SSH
c) SMTP
d) FTP
Answer: b) SSH
Which of the following is not a common cable type used in networking?
a) Coaxial cable
b) Fiber-optic cable
c) Twisted-pair cable
d) HDMI cable
Answer: d) HDMI cable
In the OSI model, which layer is responsible for ensuring end-to-end communication and error recovery?
a) Transport layer
b) Network layer
c) Data link layer
d) Presentation layer
Answer: a) Transport layer
What does the term “bandwidth” refer to in networking?
a) The physical width of network cables
b) The speed at which data is transmitted on a network
c) The number of devices connected to a network
d) The geographic coverage of a network
Answer: b) The speed at which data is transmitted on a network
Which of the following is a common address type in IPv6?
a) 192.168.1.1
b) 255.255.255.0
c) 2001:0db8:85a3:0000:0000:8a2e:0370:7334
d) 10.0.0.1
Answer: c) 2001:0db8:85a3:0000:0000:8a2e:0370:7334
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