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7. Performing Connectivity Checks

This section describes how connectivity checks are performed.

7.1. STUN Extensions​

ICE extends STUN with the attributes: PRIORITY, USE-CANDIDATE, ICE-CONTROLLED, and ICE-CONTROLLING.

7.1.1. PRIORITY​

The PRIORITY attribute MUST be included in a Binding request and be set to the value computed for the local candidate.

7.1.2. USE-CANDIDATE​

The controlling agent MUST include the USE-CANDIDATE attribute in order to nominate a candidate pair.

7.1.3. ICE-CONTROLLED and ICE-CONTROLLING​

The controlling agent MUST include the ICE-CONTROLLING attribute in a Binding request. The controlled agent MUST include the ICE-CONTROLLED attribute.

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