Front Support vs Plank

What is the difference between a front support position and a plank position?  My guess is that a front support has a flat back parallel to the ground, and then hips to ankles is at a 45 degree angle, where plank is flat from shoulders to ankles.  Is this correct?

Thanks.

Straight arm plank and front support means the same thing, it is simply a use of technical words to define position.

Got it, thank you!

As a follow-up, when you are doing front support, should your shoulders be rotated forward (pushing your chest farther from the ground) or rotated backward (pushing your chest lower).  I know there are technical words but I have forgotten them.

Hi Scott, 

In front support you are trying to keep a hollow body position with shoulders protracted.

Use the videos in the course as a refrence point as the athletes show you the correct positioning for your body.

Also you are welcome to post videos to have your form checked.