T568A and T568B are the two color codes used for wiring eight-position RJ45 modular plugs.
Wiring the Cat5 cable correctly is necessary. Only a computer networking person should be consulted for this purpose, but you should follow the below steps carefully if you want to wire a Cat5 cable for your home purposes.
Now, peel off those colored wires so that the copper inside them becomes visible and pell them about 1/2" to 3/4". Now, insert these wires inside the RJ45 plug at its front to ensure that the cable is fully inserted, and the sheath is extending the plug for about ½," and this area will be put inside the crimp tool. Take the crimper tool and crimp the RJ45 plug. Now, check if the wires are arranged in the correct order according to the above steps. When done, cut the cable to this plug. It's a best practice to cut more than you need. For the second Rj45 plug, follow the above steps.