Description: Precedence is the precedence of the connection being established. Zero represents the lowest precedence. Note that non-zero values of this parameter should be subject to authentication and authorization checks, which are not specified here. In general, the distinction between precedence and priority is that precedence specifies streams that are permitted to take previously committed resources from another stream, while priority identifies those PDUs that a stream is most willing to have dropped when the stream exceeds its guaranteed limits.