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Question 1. What is a fundamental purpose of a computer network? A) To increase hardware costs B) To enable resource sharing and communication C) To restrict data flow between devices D) To eliminate the need for data backups Answer: B Explanation: The primary goal of a computer network is to facilitate resource sharing and communication among devices, improving efficiency and collaboration. Question 2. Which component of a network is responsible for physical connections such as cables and switches? A) Hosts
B) Nodes C) Segments D) Network interfaces and physical media Answer: D Explanation: Physical media and interfaces connect devices physically, including cables, switches, and network ports. Question 3. What is the main difference between a LAN and a WAN? A) LAN covers a smaller geographical area than WAN B) WAN is faster than LAN C) LAN uses wireless connections only D) WAN does not connect different cities or countries Answer: A
Question 5. Which of the following best defines bandwidth? A) The maximum data rate a network can handle B) The actual data transferred over a network in a given time C) The delay experienced in data transmission D) The physical size of a network cable Answer: A Explanation: Bandwidth refers to the maximum rate at which data can be transmitted over a network connection, typically measured in bits per second. Question 6. Throughput differs from bandwidth in that it measures what? A) The potential maximum data transfer rate
B) The actual amount of data successfully transferred over a period C) The delay in data transmission D) The capacity of a network device Answer: B Explanation: Throughput measures the actual data transfer rate achieved, which can be less than the theoretical maximum bandwidth due to network congestion and other factors. Question 7. Which unit is used to typically express network speed in Gigabits per second? A) Gbps B) Mbps C) Kbps D) bps
Question 9. Which OSI layer is responsible for establishing, managing, and terminating sessions between applications? A) Transport B) Session C) Presentation D) Application Answer: B Explanation: The Session layer manages sessions between applications, controlling connections and data exchange. Question 10. In the OSI model, which layer is responsible for converting data into a format suitable for transmission over physical media? A) Data Link B) Physical
C) Network D) Transport Answer: B Explanation: The Physical layer handles the transmission of raw bits over physical media, converting data into electrical, optical, or radio signals. Question 11. Which protocol suite is associated with the Internet and comprises four main layers? A) OSI B) TCP/IP C) UDP/IP D) Ethernet Answer: B
Question 13. Which protocol in the Internet layer is responsible for converting IP addresses to MAC addresses? A) ARP B) ICMP C) DHCP D) DNS Answer: A Explanation: The Address Resolution Protocol (ARP) maps IP addresses to MAC addresses, enabling devices to locate each other on the local network. Question 14. Which of the following is a connection-oriented transport protocol? A) UDP
B) TCP
C) IP
D) ICMP
Answer: B Explanation: TCP provides reliable, connection-oriented communication, establishing a session before data transfer and ensuring delivery. Question 15. Which TCP feature ensures data is received correctly and in order? A) Segmentation B) Acknowledgments C) Flow control D) Error checking
Question 17. Which port range is reserved for well-known services such as HTTP and FTP? A) 0- 1023 B) 1024- 49151 C) 49152- 65535 D) 65536- 70000 Answer: A Explanation: Ports 0-1023 are well-known ports assigned to common services like HTTP (80), FTP (21), and SMTP (25). Question 18. A network device that operates mainly at Layer 2 and uses MAC addresses to forward frames is called a? A) Hub B) Switch
C) Router D) Modem Answer: B Explanation: Switches operate at Layer 2, using MAC addresses to switch frames efficiently within LANs. Question 19. Which device functions primarily at Layer 3 and determines the best path for data? A) Hub B) Switch C) Router D) Bridge Answer: C
A) High cost for cabling B) Difficult to troubleshoot C) Network failure can disable entire network D) Limited number of devices Answer: C Explanation: In a bus topology, if the main cable fails, the entire network becomes inoperative. Question 22. Which topology provides high redundancy and fault tolerance by connecting each device to multiple others? A) Star B) Ring C) Mesh
D) Bus Answer: C Explanation: Mesh topology connects devices in a way that multiple pathways exist, offering high redundancy and fault tolerance. Question 23. What is the primary purpose of subnetting? A) To increase the number of IP addresses B) To segment networks for improved management and security C) To eliminate the need for routing D) To convert IPv4 addresses to IPv Answer: B Explanation: Subnetting divides a larger network into smaller, manageable segments, improving security and efficiency.
B) Replaces IPv4 with IPv C) Ensures all IP addresses are public D) Eliminates the need for subnet masks Answer: A Explanation: CIDR allows for flexible subnetting, reducing IP address wastage and simplifying routing. Question 26. Given an IP address 192.168.10.50 with a subnet mask 255.255.255.0, what is the network address? A) 192.168.10. B) 192.168.50. C) 192.168.0. D) 192.168.10.
Answer: A Explanation: Applying the subnet mask to the IP address results in the network address 192.168.10.0. Question 27. In IPv6, which address type is used to send packets to multiple destinations simultaneously? A) Unicast B) Multicast C) Anycast D) Broadcast Answer: B Explanation: IPv6 Multicast addresses are used to deliver packets to multiple specific hosts.
