Which cable type should be used to connect two like devices when MDI-X auto-detection is unavailable (requires pins 1↔3 and 2↔6)?
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Correct answer: Crossover.
Why this is the answer
A crossover cable is used to connect two like devices (e.g., switch to switch, host to host, router to router) when auto-MDI/MDI-X is not supported. It internally swaps the transmit and receive pairs, meaning pin 1 (transmit) on one end connects to pin 3 (receive) on the other, and pin 2 (transmit) connects to pin 6 (receive). A straight-through cable is used for unlike devices (e.g., switch to host), connecting pin 1 to pin 1, pin 2 to pin 2, etc. A console cable is used for out-of-band management of network devices, connecting a computer's serial port to a device's console port. A rollover cable is a specific type of console cable.
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