Which one of the following twisted pair wiring standards defines the pinouts for a crossover cable connection?

The standard that defines the pinouts for a crossover cable connection is T568A to T568B. A crossover cable is designed to connect two devices directly, such as connecting two switches, routers, or computers. In this configuration, one end of the cable is terminated using the T568A standard, while the other end uses the T568B standard.

This configuration allows for the necessary crossover of transmit and receive pairs. The T568A wiring standard uses different pin assignments than T568B, which is fundamental for the intended crossover function. Therefore, when one end of the cable is wired as T568A and the other end as T568B, it allows for proper electrical connections that facilitate direct communication between devices by aligning transmit and receive pairs appropriately.

Understanding this aspect of twisted pair wiring is essential in networking to ensure devices communicate effectively when directly connected.