Loud knocking & squeaking noises coming from under car when in motion.

What is your question?

I'm getting loud knocking & and squeaking noises from under my car. The squeaking sounds like a tensioner but it not because the noise only happens when the car is moving. The knocking sounds much like a loose muffler or tailpipe, (or 2 or 3) but it's tight. Could it be that the noises are bad shocks & struts? Any thoughts? Thanks!