This really sounds stupid because I've seen a router, but let's get into the basics.

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[–] 3 points 4 months ago

Also, all the devices in your home network (pc, tv, phone, thermostat, whatever) can talk to each other via broadcast. They just frequently yell out "I am here! See me!". The router stops those broadcasts from going into your neighbour's network or even the internet.

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