Wired and Wireless Networks
Revise Wired and Wireless Networks for GCSE Computer Science with this free worksheet and full mark scheme — Foundation and Higher exam-style questions with worked answers for AQA GCSE Computer Science (8525). Networks connect using cables or wirelessly, each with advantages in speed, range and security.
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These worksheets and mark schemes are original, written for Virtus Academy and checked against the current AQA specification. Every worksheet comes with a full mark scheme.
Topic overview
Networks connect devices using wired or wireless connections, and each has clear advantages.
Wired connections use cables, usually Ethernet or fibre optic. They are faster, more reliable and more secure, because an attacker must physically connect to the cable to intercept data. The disadvantage is that devices cannot move freely and cabling is expensive to install.
Wireless connections use radio waves, usually Wi-Fi. Devices can move freely and no cabling is needed, so installation is cheaper and quicker. But the connection is slower, less reliable, affected by distance and physical obstructions, and less secure because the signal travels through the air where it can be intercepted without physical access.
Revision notes
Wired connections
Use cables, usually Ethernet or fibre optic.
Advantages: faster, more reliable, more secure. Disadvantages: devices cannot move freely, and installing cabling is expensive and disruptive.
Wireless connections
Use radio waves, usually Wi-Fi.
Advantages: devices can move freely, no cabling needed, cheaper and quicker to install. Disadvantages: slower, less reliable, and affected by distance and obstructions such as walls.
The security difference
Intercepting a wired connection requires physical access to the cable.
A wireless signal travels through the air and can be picked up by anyone in range, which is why encryption matters far more on a wireless network.
Key points
- Wired connections use cables.
- Wired is faster and more reliable.
- Wired is more secure than wireless.
- Wireless uses radio waves.
- Wireless allows devices to move freely.
- Wireless signals can be intercepted from a distance.
Worked examples
Example 1
State two advantages of a wired connection over a wireless one. [2 marks]
Working
Example 2
Explain why a wireless network is less secure than a wired one. [2 marks]
Working
Example 3
Give one situation where wireless would be preferred and explain. [2 marks]
Working
Common mistakes
Saying wireless is always more convenient and therefore better.
Speed, reliability and security all favour wired.
Forgetting the physical access point in security.
That is the core of the security difference.
Recommending a type without justifying it.
Link the choice to the specific situation.
Saying wireless is unaffected by walls.
Obstructions reduce signal strength significantly.
Exam tips
- Give both advantages and disadvantages.
- Explain security through physical access.
- Justify recommendations with the situation.
- Name Ethernet and Wi-Fi as specific examples.
Key terms
- Wired connection
- A network connection using cables.
- Wireless connection
- A network connection using radio waves.
- Ethernet
- A common wired networking standard.
- Interception
- Capturing data as it travels across a network.
Related topics
Written and reviewed against the current AQA specification. Spotted an error? Let us know.