Wired and wireless connections, bandwidth and speed, protocols, and how data moves around a network.
Ways to connect
Devices connect to a network and the internet in two broad ways:
Wired — Ethernet cable or fibre-optic. Fast, secure, reliable, but not portable.
Wireless — Wi-Fi, Bluetooth (short range), mobile data (3G/4G/5G). Convenient and portable, but can be slower, less secure and affected by range/interference.
A wireless access point or router provides the wireless signal; a modem connects the local network to the internet via the ISP.
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