The transmit pair of each device be connected to the receive pair of the device on the other end.
A crossover cable reverses the signals at ends of the cable.
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When wiring one end of an Ethernet cable with T568A and the other end with T568B, the wire pairs that get switched are the orange and green pairs. This crossover arrangement is typically used to connect two networking devices directly without the need for a crossover cable.
Crossover
Is a crossover cable needed to connect Host computers to the switch? Why or why not?
A crossover cable.
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Usually older Ethernet switches needed to be connected using a crossover cable. Now, most modern switches have auto-crossover feature that lets you use a straight Ethernet cable. You could also connect two computers using a crossover cable, but like with switches, most Ethernet interfaces on computers also support auto-crossover.
(orange white) (orange) (green white) (blue) (blue white) (green) (brown white) (brown) (green white) (green) (orange white) (blue) (blue white) (orange) (brown white) (brown) In a crossover cable only the green and orange pairs switch positions.
straight through is same pin out both ends. crossover has transmit and receive lines reversed
straight through is same pin out both ends. crossover has transmit and receive lines reversed