The NSC is a Presidential forum chaired by the President of USA and composed of the Vice President, the Secretary of State, the Secretary of the Treasury, the Secretary of Defense, and the Assistant to the President for National Security Affairs. The NSC's function is to advise and assist the President on national security and foreign policies. The Council also serves as the President's principal arm for coordinating these policies between government agencies.
The NSA is one of the multiple national security agencies, dedicated to protect the nation by being the leader in global cryptology. The NSA coordinates tightly with NSC in national security affairs.