T568 is the technical name for the pin out of an RJ-45 cable. There are two types, T568A and T568B. A crossover cable has one of each end, while a straight through cable is the same on both ends. A straight through can be both T568B or T568A.
An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly. It is most often used to connect two devices of the same type: e.g. two computers (via network interface controller) or two switches to each other. By contrast, patch cables or straight through cables are used to connect devices of different types, such as a computer to a network switch or hub.
Many devices today support Auto MDI-X capability, …