A connector used for diagnosing transmission problems. Also called a "wrap plug," it plugs into an Ethernet or serial port and crosses over the transmit line to the receive line so that outgoing ...

I have a test setup at work where we have multiple rackmount PCs, each with a 10-port USB hub to which 8 USB devices are attached. Every now and then, I've come across a hub that seems flaky, but I'd ...