Devices can connect to networks using wired connections (Ethernet) or wireless connections (Wi-Fi, Bluetooth). Each has advantages and disadvantages relating to speed, security, convenience, and cost.
Key points
Definition:Ethernet: a wired method of connecting devices in a LAN using physical cables. Fast, reliable, and secure.
Definition:Wi-Fi: wireless technology using radio waves to connect devices to a LAN and the Internet without cables.
Definition:Bluetooth: short-range wireless technology (about 10 metres) for connecting nearby devices without cables.
Wired advantages: faster and more reliable speeds, more secure (harder to intercept data through physical cables).
Wired disadvantages: less convenient (devices must be physically connected), harder to set up and expand.
Wireless advantages: more convenient and flexible, easier and cheaper to install, easy to add new users.
Wireless disadvantages: slower and less reliable, less secure (radio signals can be intercepted), affected by walls and interference.
Exam Tip:Comparison questions are common. Structure as: wired advantage vs wireless disadvantage (or vice versa) for each point.
Exam Tip:For benefits of wireless at home: (1) more devices can connect, (2) devices can move around, (3) no need for cables/trip hazards, (4) some devices only have wireless (e.g. phones).
Exam Tip:For drawbacks of wireless: (1) prone to interference, (2) limited signal range, (3) slower rate of TRANSMISSION, (4) increased security risk. Be specific — don't just say 'it is slower'.
Common Mistake:Just saying wireless is 'slower' without specifying WHAT is slower. Say 'slower rate of data transmission' or 'less bandwidth'.
Exam Tip:Ethernet is a standard because it is used by most manufacturers, ensuring devices can connect and communicate regardless of who made them.