Fundamentals of Communication and Networking Practice Questions
A-Levels · A-Level Computer Science · 151 free MCQs with instant results and detailed explanations.
151
Total
48
Easy
75
Medium
28
Hard
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Sample Questions from Fundamentals of Communication and Networking
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Q1
Easy
Which of the following is the most common method for connecting computers in a Local Area Network (LAN)?
A.
Star topology
B.
Bus topology
C.
Ring topology
D.
Mesh topology
Show Answer & Explanation
Correct Answer: A
Star topology is the most common LAN configuration because it is easy to install and manage. Each computer is connected to a central hub, making troubleshooting simpler.
Q2
Easy
What is the primary function of a router in a network?
A.
To connect multiple devices within a LAN
B.
To manage traffic between different networks
C.
To amplify the signal strength of network connections
D.
To store and retrieve data
Show Answer & Explanation
Correct Answer: B
A router's primary function is to manage traffic between different networks by forwarding data packets based on their destination IP addresses.
Q3
Easy
If a computer has an IP address of 192.168.1.10, what is the subnet mask typically used for a Class C network?
A.
255.0.0.0
B.
255.255.0.0
C.
255.255.255.0
D.
255.255.255.255
Show Answer & Explanation
Correct Answer: C
A Class C network typically uses a subnet mask of 255.255.255.0, allowing for up to 254 usable IP addresses within the local network.
Q4
Medium
Which of the following protocols is primarily used for sending email messages?
A.
SMTP
B.
HTTP
C.
FTP
D.
IMAP
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Correct Answer: A
SMTP (Simple Mail Transfer Protocol) is specifically designed for sending emails, whereas IMAP (Internet Message Access Protocol) and POP (Post Office Protocol) are used to retrieve them.
Q5
Medium
In a local area network (LAN), what is the primary purpose of a switch?
A.
To connect different networks
B.
To route data packets
C.
To filter and forward traffic
D.
To provide Wi-Fi connectivity
Show Answer & Explanation
Correct Answer: C
A switch connects devices within the same network by filtering and forwarding traffic based on MAC addresses, enhancing the efficiency of data transmission.
Q6
Medium
What is the maximum transfer unit (MTU) size used in Ethernet networks?
A.
1500 bytes
B.
9000 bytes
C.
64 bytes
D.
256 bytes
Show Answer & Explanation
Correct Answer: A
The maximum transfer unit (MTU) size for Ethernet frames is typically 1500 bytes, which is crucial for determining how much data can be sent in one frame without fragmentation.
Q7
Medium
Which layer of the OSI model is responsible for establishing, managing, and terminating connections between applications?
A.
Application layer
B.
Transport layer
C.
Session layer
D.
Network layer
Show Answer & Explanation
Correct Answer: C
The Session layer in the OSI model is responsible for managing sessions, which includes establishing, maintaining, and terminating connections between applications.
Q8
Hard
In a network using the OSI model, which layer is responsible for establishing, managing, and terminating communication sessions between applications?
A.
Session Layer
B.
Transport Layer
C.
Network Layer
D.
Data Link Layer
Show Answer & Explanation
Correct Answer: A
The Session Layer (Layer 5) is specifically designed to manage sessions, which includes establishing, maintaining, and terminating the connections between applications. It ensures that the session is correctly initiated and closed, making it distinct from the other layers.
Q9
Hard
A specific type of network topology where all nodes are connected to a single central cable is known as which of the following?
A.
Star Topology
B.
Ring Topology
C.
Bus Topology
D.
Mesh Topology
Show Answer & Explanation
Correct Answer: C
Bus Topology connects all devices to a single central cable, known as the bus. This configuration is characterized by its simplicity and cost-effectiveness, but can be less reliable due to its reliance on a single cable.
Q10
Hard
In a network topology, which of the following topologies will be the most efficient in terms of data transmission and fault tolerance?
A.
Star Topology
B.
Bus Topology
C.
Mesh Topology
D.
Ring Topology
Show Answer & Explanation
Correct Answer: C
Mesh topology is the most efficient in terms of data transmission and fault tolerance because it allows multiple paths for data to travel between devices. If one connection fails, data can take an alternative route. This enhances both reliability and speed of communication.
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Fundamentals of Communication and Networking — A-Levels A-Level Computer Science Practice Questions Online
This page contains 151 practice MCQs for the chapter Fundamentals of Communication and Networking in A-Levels A-Level Computer Science. The questions are organized by difficulty — 48 easy, 75 medium, 28 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.