A RJ45 is a cable connector . This connector is also known as an ethernet connector. The RJ45 wires are white, green, orange, blue and brown the brown is rarely used. When crimping the RJ45 strip the connector about 2cm. There are many different ways to crimp a RJ45 one way is known as a crossover which can be found at http://faculty.chi.devry.edu/galatta/CableLesson.pdf.
