CLEP and DSST are both test for credit programs designed to offer credit for accumulated knowledge and experience through examination.

CLEP  College Level Examination Program  © College Board Company
DSST   Dantes Special Subject Test © Prometric

Students wanting to take an exam should find out from their institution what test their college will accept.
Once a student takes a test the scores are mailed to the school they indicated on the CLEP test screen, to be added to their transcript.