This key facts covers Wireless Networks (WiFi) within Wired vs Wireless for GCSE Computer Science. Revise Wired vs Wireless in Networks for GCSE Computer Science with 15 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 4 of 9 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 4 of 9
Practice
15 questions
Recall
18 flashcards
Wireless Networks (WiFi)
What is Wireless Networking?
Devices connect using radio waves transmitted through the air. A Wireless Access Point (WAP) or router broadcasts the signal. Devices need a wireless NIC (WiFi adapter) to receive it.
How It Works:
- Radio frequencies: 2.4 GHz (longer range, slower) or 5 GHz (shorter range, faster)
- WAP/Router: Broadcasts WiFi signal in all directions
- Wireless NIC: Device's WiFi adapter receives signal
- SSID: Network name you see when connecting (e.g., "Home WiFi")
- Encryption: WPA2/WPA3 protects data transmitted over air
Wireless Network Advantages:
- Freedom to move: Work anywhere within WiFi range
- Easy to connect: Just select network and enter password
- No cables needed: Clean, no messy wires
- Perfect for mobile: Phones, tablets, laptops designed for WiFi
- Easy to expand: Add devices without running new cables
- Flexible placement: Work in any room with coverage
- Guest access: Easy to provide temporary network access
Wireless Network Disadvantages:
- Slower speeds: Typically 50-1200 Mbps (vs 1000-10000 Mbps wired)
- Interference: Walls, microwaves, other WiFi networks degrade signal
- Less secure: Radio waves can be intercepted by anyone in range
- Variable performance: Speed fluctuates based on distance, obstacles
- Higher latency: More delay than wired - bad for gaming
- Shared bandwidth: More devices = slower for everyone
- Range limitations: Signal weakens with distance (typically 30-50m indoors)
- Setup complexity: Need to configure security (WPA2/WPA3)
Best Uses for Wireless:
- Laptops: Mobility is key feature
- Phones & tablets: No Ethernet ports, always wireless
- Smart home devices: IoT devices scattered around house
- Temporary workspaces: Flexibility to move around
- Public areas: Coffee shops, libraries, airports
- Guest devices: Visitors connecting temporarily