Clause asserts that all states must honor each others laws. this clause has recently been invoked as an argument against the was signed into law in 1996. (only one box is provided for answers.

full faith and credit clause; the main aim of the clause was to unify the states. It called for respect and honor of other states legislation,and laws.
defense of marriage act(1996) the united state federal law defined marriage  only as a union of married men and women and called for states to reject state laws that protected same sex marriage. The act was ruled unconstitutional on the basis of full faith and credit clause and on liberty grounds.

The way this small state - large state compromise guards against tyranny is that small states and large states have one note: i am sorry but i was not able to give you the full answer. but i got this answer from