It is most often used to connect two devices of the same type, e.g. Look for cat 5 cat 6 wiring diagram with color code cable how to wire ethernet rj45 and the defference between each type of cabling crossover straight through These cables are sometimes made with cable that has a red outer sheath.
Cat 6 has to meet more stringent specifications for crosstalk and system noise than cat 5 and cat 5e. An ethernet crossover cable is a crossover cable for ethernet used to connect computing devices together directly. In other words, pin 1 connector a goes to pin 1 on connector b, pin 2 to pin 2, etc. If you haven't read the wiring section, don't worry because we’ll provide enough information to help understand about the concept.