Cabinet of the United States (Wikipedia)
The Cabinet of the United States is the principal official advisory body to the president of the United States. The Cabinet generally meets with the president in a room adjacent to the Oval Office in the West Wing of the White House. The president chairs the meetings but is not formally a member of the Cabinet. The vice president of the United States serves in the Cabinet by statute. The heads of departments, appointed by the president and confirmed by the Senate, are members of the Cabinet, and acting department heads also participate in Cabinet meetings whether or not they have been officially nominated for Senate confirmation. The president may designate heads of other agencies and non-Senate-confirmed members of the Executive Office of the President as members of the Cabinet.United States National Security Council (Wikipedia)
The United States National Security Council (NSC) is the principal forum used by the president of the United States for consideration of national security, military, and foreign policy matters. Based in the White House, it is part of the Executive Office of the President of the United States, and composed of senior national security advisors and Cabinet officials.United States Homeland Security Council (Wikipedia)
The Homeland Security Council (HSC) is an entity within the Executive Office of the President of the United States tasked with advising the president on matters relevant to Homeland Security. The current homeland security advisor is Elizabeth Sherwood-Randall.