How do you know that your patch cables are good? For simple jumper wires, a multimeter is about all you need to know for sure. But things can get weird in the RF world, in which case you might want to ...

A cable running upstairs to a desktop from the router is only carrying 100Mb/s Full Duplex, even when both endpoints are gigabit. When tested with a cable tester, wire 4 is blank and does not connect.

I've just run two new CAT6 cables in my house and I'm having problems with my TiVo. However, I'm trying to narrow down the problem by making sure that the cables are good. My switch is a Dell ...