Wired - Ethernet; Wireless - Wi-Fi, Bluetooth;

Modes of connection: Wired - Ethernet; Wireless - Wi-Fi, Bluetooth;

1.3.2 Wired and wireless networks, protocols and layers

Wired and wireless networks, protocols and layers — Note 1 of 13

What you need to know

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.

What to know

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.

Key terms

Exam tipCommon mistake

Ethernet: A wired method of connecting devices in a LAN using physical cables. Fast, reliable, and secure.
Exam tip: Ethernet is a standard because it is used by most manufacturers, ensuring devices can connect and communicate regardless of who made them.
Wi-Fi: Wireless technology using radio waves to connect devices to a LAN and the Internet without cables.
Bluetooth: Short-range wireless technology (about 10 metres) for connecting nearby devices without cables.

Exam technique

Tip:Comparison questions are common. Structure as: wired advantage vs wireless disadvantage (or vice versa) for each point.
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).
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'.
Mistake:Just saying wireless is 'slower' without specifying WHAT is slower. Say 'slower rate of data transmission' or 'less bandwidth'.

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