Is there a way to go from terminal to terminal for a connecting flight without having to go through security again?

Yes. All concourses are connected via train and moving sidewalk. You will not need to go through security if you are arriving from a domestic flight.

Traverse effortlessly across the airport by catching the Plane Train. This service is fast and free, easy to find and a very convenient way to not only transfer flights but also to go dining at one of the countless restaurants you'll find for whatever suits your palate.

Not if you're flying internationally.

I think No.