In many cases of residential rj45-wiring for networks, you will only put the rj45 end on to plug into the distribution panel. The other end in the bedroom, office, or wherever, will have a keystone jack, which is similar to a modular phone jack.
Now on the other end of the CAT5, you will be wiring the keystone jack that snaps into the data port wall plate in each room. If your building a new home then I would definitely use Cat5 cable that runs along the wall framing and through floor and roof framing. It’s easy to install when the walls are open.
If you are just adding a home network to an existing home, you may want to consider using a wireless router for Internet. That’s not as secure, but it’s much easier than drilling holes into everything.
There is a loose standard as to the exact order of the wires into keystone jacks, so just be sure to put the wires in the same order on both ends of the circuit.
The keystone is actually color-coded and you just lay the coordinating colored wires in place and use a punch down tool to secure the wires.
Some keystone jacks have a cover that fits over the back of the port and snaps in place acting like a punchdown tool.
The keystone jacks fit into an electric box just like outlets and phone jacks do.
Once the Cat5 lines are terminated on both ends, they need to be tested with a line testers. These will test all the wires in the Cat5 cable to make sure each has a good connection. The testers are really inexpensive and worth the cost.