Computer Networks Practice Questions
GCSE · GCSE Computer Science · 149 free MCQs with instant results and detailed explanations.
149
Total
46
Easy
74
Medium
29
Hard
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Sample Questions from Computer Networks
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Q1
Easy
Which device is used to connect multiple computers in a network and manage traffic between them?
A.
Router
B.
Switch
C.
Modem
D.
Access Point
Show Answer & Explanation
Correct Answer: B
A switch is specifically designed to connect devices within a local area network (LAN) and effectively manage data traffic between them by directing packets to their intended destinations.
Q2
Easy
What does the acronym 'IP' stand for in networking?
A.
Internet Protocol
B.
Internal Process
C.
Interconnected Packet
D.
Input Procedure
Show Answer & Explanation
Correct Answer: A
The acronym 'IP' stands for Internet Protocol, which is the set of rules governing the transmission of data across networks, crucial for routing data packets to their destination.
Q3
Easy
Which topology connects all devices to a single central cable?
A.
Star
B.
Mesh
C.
Bus
D.
Ring
Show Answer & Explanation
Correct Answer: C
The bus topology connects all network devices to a single central cable, known as the bus, which carries information in both directions to all connected devices.
Q4
Medium
What is the primary purpose of a router in a computer network?
A.
To connect multiple networks and route data between them
B.
To amplify signal strength in a network
C.
To store files for network users
D.
To protect the network from unauthorized access
Show Answer & Explanation
Correct Answer: A
A router's main function is to connect different networks and manage the traffic between them, directing data to its appropriate destination.
Q5
Medium
In a peer-to-peer network, which of the following is true?
A.
All devices can act as both clients and servers
B.
Only one device controls the network
C.
Devices must be connected to a central server
D.
Data can only flow from the server to clients
Show Answer & Explanation
Correct Answer: A
In a peer-to-peer network, each device can function as both a client and a server, allowing them to share resources directly with each other.
Q6
Medium
What protocol is used for securely transmitting files over the Internet?
A.
FTP
B.
HTTP
C.
SFTP
D.
SMTP
Show Answer & Explanation
Correct Answer: C
SFTP (Secure File Transfer Protocol) is used for securely transferring files, providing encryption and secure authentication during the transfer process.
Q7
Medium
Which of the following devices is primarily used to connect a computer to a network?
A.
Hub
B.
Modem
C.
Repeater
D.
Switch
Show Answer & Explanation
Correct Answer: B
A modem is used to connect a computer to the Internet by converting digital data from a computer into an analog signal for transmission over phone lines and vice versa.
Q8
Hard
Which of the following protocols is specifically used for secure data transmission over a network?
A.
HTTP
B.
FTP
C.
SSH
D.
SMTP
Show Answer & Explanation
Correct Answer: C
SSH (Secure Shell) is designed specifically for secure access to network services over an unsecured network, making it the correct choice for secure data transmission.
Q9
Hard
A company implements a subnet mask of 255.255.255.192. What is the maximum number of usable host addresses in each subnet?
A.
62
B.
30
C.
126
D.
14
Show Answer & Explanation
Correct Answer: A
With a subnet mask of 255.255.255.192, we have 6 bits remaining for host addresses. The formula for calculating usable addresses is 2^n - 2 (where n is the bits for hosts). So, 2^6 - 2 = 64 - 2 = 62 usable addresses.
Q10
Hard
Which of the following protocols is primarily responsible for ensuring secure communication over the internet by encrypting data during transmission?
A.
HTTP
B.
FTP
C.
SSH
D.
DNS
Show Answer & Explanation
Correct Answer: C
SSH (Secure Shell) is designed for secure communication and encrypts data to protect it during transmission, unlike HTTP, FTP, and DNS, which do not provide encryption.
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Computer Networks — GCSE GCSE Computer Science Practice Questions Online
This page contains 149 practice MCQs for the chapter Computer Networks in GCSE GCSE Computer Science. The questions are organized by difficulty — 46 easy, 74 medium, 29 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.