<td>An index, starting at 0, that enables the parties to keep track of updates to the candidate throughout the life of the session. For details, see the <linkurl='#protocol-restart'>ICE Restarts</link> section of this document.</td>
<td>An index, starting at 0, that enables the parties to keep track of updates to the candidate throughout the life of the session. For details, see the <linkurl='#protocol-restarts'>ICE Restarts</link> section of this document.</td>
<td>extended name/value pair in a=candidate line</td>