Just a couple notes on what people have said in this thread:
I was told that even though you can use the cap to terminate the cable at the jack, that is not CAT 5e or CAT6 spec. The end of the wire is not suppose to stick out from the termination area of the jack and could make it fail the certification testing.
Use a 110 punch down tool set on low impact! If you are having problems with broken wires, check your 110 blade, punch tool and possibly even the cable. Some of these companies that are selling "cheap" cat 5e and cat 6 cable are getting it from China and it isn't good cable, I've seen it where it won't even stay connected at the jack or patch panel because the wire itself is too thin in spots, stripping the wire back and upon visual inspection, it appeared to vary between 24 and 28 gauge, although, I didn't have anything to actually measure it with. Lesson learned: You get what you pay for.
