Computer Networking MCQ | SET – 04
Introduction
Computer networking refers to the practice of connecting computers and other devices together to facilitate communication and the sharing of resources.
It enables devices to exchange data and information, allowing users to access remote resources, communicate with others, and access the vast amount of information available on the Internet.
Here are some multiple-choice questions about Computer Networking MCQ | SET – 04 along with their answers and explanations. Here are 20 Questions for you:
Question 1: Which of the following devices operates at the Data Link layer of the OSI model?
A) Router
B) Hub
C) Switch
D) Firewall
Answer: C) Switch
Explanation: A switch operates at the Data Link layer (Layer 2) of the OSI model. It forwards data packets based on MAC addresses and provides efficient communication within a local area network (LAN).
Question 2: What is the default port number for the HTTPS protocol?
A) 80
B) 443
C) 21
D) 23
Answer: B) 443
Explanation: The default port number for the HTTPS (Hypertext Transfer Protocol Secure) protocol, which is used for secure communication over the Internet, is 443.
Question 3: Which protocol is used for dynamic IP address allocation?
A) DHCP
B) DNS
C) SNMP
D) FTP
Answer: A) DHCP
Explanation: DHCP (Dynamic Host Configuration Protocol) is used for dynamically assigning IP addresses to network devices. It allows devices to request and obtain IP configuration information from a DHCP server.
Question 4: Which network topology connects all devices in a daisy-chain fashion?
A) Star
B) Bus
C) Ring
D) Mesh
Answer: B) Bus
Explanation: In a bus network topology, all devices are connected to a single communication line. It forms a linear daisy-chain configuration, where data is transmitted to all devices on the bus.
Question 5: Which protocol is used to resolve IP addresses to MAC addresses?
A) ARP
B) ICMP
C) TCP
D) UDP
Answer: A) ARP
Explanation: ARP (Address Resolution Protocol) is used to resolve IP addresses to MAC addresses in a local network. It maps the IP address of a device to its corresponding MAC address.
Question 6: Which subnet mask would allow for the maximum number of hosts on a network?
A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255
Answer: A) 255.0.0.0
Explanation: A subnet mask determines the network and host portions of an IP address. The subnet mask 255.0.0.0 (or /8) allows for the maximum number of hosts on a network, as it reserves only 8 bits for the network portion.
Question 7: Which protocol is responsible for the reliable delivery of data packets in the TCP/IP suite?
A) UDP
B) HTTP
C) FTP
D) TCP
Answer: D) TCP
Explanation: TCP (Transmission Control Protocol) is responsible for the reliable delivery of data packets in the TCP/IP suite. It ensures that packets are delivered without errors, in the correct order, and with congestion control mechanisms.
Question 8: Which protocol is used to access email from a remote server?
A) HTTP
B) SMTP
C) POP3
D) SNMP
Answer: C) POP3
Explanation: POP3 (Post Office Protocol version 3) is used to access email messages from a remote email server. It allows users to download their emails to a local device for offline reading.
Question 9: Which routing algorithm uses a distance vector approach and the Bellman-Ford equation?
A) OSPF
B) RIP
C) BGP
D) EIGRP
Answer: B) RIP
Explanation: RIP (Routing Information Protocol) uses a distance vector algorithm and the Bellman-Ford equation for routing decisions. It exchanges routing information with neighboring routers and calculates the best path based on the hop count.
Question 10: Which network device operates at the Application layer of the OSI model?
A) Router
B) Bridge
C) Gateway
D) Proxy server
Answer: D) Proxy server
Explanation: A proxy server operates at the Application layer (Layer 7) of the OSI model. It acts as an intermediary between client devices and servers, providing services such as caching, content filtering, and network anonymity.
Question 11: Which of the following devices operates at the Data Link layer of the OSI model?
A) Router
B) Switch
C) Hub
D) Bridge
Answer: B) Switch
Explanation: A switch is a device that operates at the Data Link layer (Layer 2) of the OSI model. It is responsible for forwarding data frames between devices connected to its ports based on their MAC (Media Access Control) addresses.
Question 12: Which protocol is used to automatically assign IP addresses to devices on a network?
A) DNS
B) DHCP
C) ARP
D) FTP
Answer: B) DHCP
Explanation: DHCP (Dynamic Host Configuration Protocol) is used to automatically assign IP addresses to devices on a network. It allows devices to obtain IP addresses, subnet masks, default gateways, and other network configuration parameters dynamically.
Question 13: Which of the following is an example of a connection-oriented protocol?
A) UDP
B) ICMP
C) TCP
D) HTTP
Answer: C) TCP
Explanation: TCP (Transmission Control Protocol) is a connection-oriented protocol. It provides reliable and ordered delivery of data packets by establishing a connection between the sender and receiver before transmitting data.
Question 14: Which network topology connects all devices in a linear fashion, where each device has two connections, except for the first and last devices?
A) Star
B) Bus
C) Ring
D) Mesh
Answer: B) Bus
Explanation: The Bus network topology connects all devices in a linear fashion, where each device has two connections, except for the first and last devices. All devices share a common communication medium (the bus) to transmit and receive data.
Question 15: Which of the following is an example of an application-layer protocol for retrieving email from a mail server?
A) POP3
B) DNS
C) SMTP
D) ICMP
Answer: A) POP3
Explanation: POP3 (Post Office Protocol version 3) is an application-layer protocol used for retrieving email from a mail server. It allows the client to download emails from the server and typically uses TCP for communication.
Question 16: Which of the following IP addresses belongs to the private IP address range defined by RFC 1918?
A) 192.168.0.1
B) 172.16.0.1
C) 10.0.0.1
D) 169.254.0.1
Answer: A) 192.168.0.1
Explanation: The IP address range 192.168.0.0 to 192.168.255.255 is part of the private IP address range defined by RFC 1918. These addresses are commonly used for private networks within organizations.
Question 17: Which protocol resolves IP addresses to MAC addresses on a local network?
A) ARP
B) DHCP
C) DNS
D) ICMP
Answer: A) ARP
Explanation: ARP (Address Resolution Protocol) resolves IP addresses to MAC addresses on a local network. It is responsible for mapping an IP address to the corresponding MAC address of a device within the same network.
Question 18: Which of the following wireless standards operates in the 2.4 GHz frequency band and provides a maximum data rate of up to 54 Mbps?
A) 802.11a
B) 802.11b
C) 802.11g
D) 802.11n
Answer: C) 802.11g
Explanation: 802.11g is a wireless standard that operates in the 2.4 GHz frequency band and provides a maximum data rate of up to 54 Mbps. It is backward compatible with 802.11b and supports higher data rates than 802.11b.
Question 19: Which device is used to connect multiple networks together and forward packets between them based on their IP addresses?
A) Hub
B) Switch
C) Router
D) Modem
Answer: C) Router
Explanation: A router is used to connect multiple networks together and forward packets between them based on their IP addresses. It operates at the Network layer (Layer 3) of the OSI model and determines the optimal path for data transmission.
Question 20: Which network protocol is commonly used to remotely access and manage devices over a secure encrypted connection?
A) SSH
B) FTP
C) SNMP
D) Telnet
Answer: A) SSH
Explanation: SSH (Secure Shell) is a network protocol commonly used to remotely access and manage devices over a secure encrypted connection. It provides secure remote command-line access, file transfer, and other network services. It is a more secure alternative to Telnet.
Conclusion:
Please note that these questions cover some Computer Networking concepts in computer science. I hope the explanations help clarify the concepts for you. If you have any specific topics or areas you’d like to explore further, feel free to ask!