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I've read somewhere that wired home routers often act like a switchhub, and when you send data to your router, it broadcasts it to the whole network, even when it's addressed to an outer computer. Because of this, it was possible to intercept unsecure communications from the LAN to anywhere simply by having another computer wired to the router.
Is this still the case on many home routers?
Switches don't do that. Hubs do. – user1686 – 2011-02-13T21:00:05.573