At the ends of such cables one expects plugs or sockets. RJ-45 plugs are the ones to use with the cable depicted above. Below is a picture of two unused RJ-45 plugs (from the top and bottom). For the sake of comparison an RJ-11 telephone plug (attached to a telephone cable) is shown on the left.
The order in which wires are arranged depends on the wiring scheme used at a particular installation. The following diagram depicts the two alternatives. T568A starts with the green and white wire in position 1 and ends with the solid brown wire in position 8. In contrast, T568B starts with the orange and white wire in position 1, but also ends with the solid brown wire in position 8.
The 'strange' use of blue in both standards in positions 4 and 5 is intended to ensure compatibility with telephone wiring. Although the RJ-11 plug has four pins, ordinary telephone connections only use the middle two. An RJ-11 plug physically fits into an RJ-45 socket and hence installations that use either of these wiring schemes can use the same wiring for telephone or network services. (In some cases it may even be and/or.)
The next picture shows an RJ-45 socket from the rear.