The CISSP is the most powerful of security certifications as it opens the door to security management.
Although the CISSP requires a number of years of years of full-time experience, the Associates of (ISC)2 may be taken upon graduation and will turn into a full CISSP after you get the experience. You would not have to retake the test.
Here is a link to a great, free, guide that explains the knowledge areas covered in the exam.
http://resources.infosecinstitute.com/what-you-need-to-know-for-passing-cissp-domain-1/