What it is
A Local Area Network (LAN) connects computers and devices in a small area like a home, office, or school. Devices talk to each other through ethernet cables or Wi-Fi, sharing files, printers, and internet access.
Why it matters
A good LAN makes everything feel fast and seamless - shared drives open quickly, printers are available to everyone, and one secure internet connection serves the whole space.
How it works - quick tour
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Router or gateway connects your LAN to the internet.
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Switches link wired devices and manage traffic inside the LAN.
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Access points provide Wi-Fi for laptops, phones, and IoT.
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IP addressing and DHCP give each device an address so it can communicate.
Good practices
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Use WPA2/WPA3 Wi-Fi with a strong passphrase.
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Keep the router and firmware updated and change default passwords.
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Create a guest network or separate VLAN for visitors and IoT.
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Turn off UPnP and unused port forwarding.
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Back up router configs and document key settings.