3.1.4.7 Processing the Answer to the Final Offer

An endpoint, after receiving the answer to its final offer, MUST switch to using the local and remote candidates in the answer for media flow. An endpoint, upon receiving the answer to its final offer, SHOULD free all local candidates other than the selected local candidate. If the selected local candidate is a TURN candidate, a Set Active Destination message, as specified in [MS-TURN], SHOULD be sent for that candidate.