Question: In an SDP (Session Description Protocol) for an RTP session employing the EVS (Enhanced Voice Services) codec, how should the RTP clock rate be specified in the "a=rtpmap" attribute?
Option 1: The RTP clock rate shall be set to 32000.
Option 2: The RTP clock rate shall be set to 16000.
Option 3: The RTP clock rate can be dynamically adjusted and should not be explicitly set.
Option 4: The RTP clock rate is inferred from the media subtype and does not need to be specified.
Explanation: According to the mapping rules for EVS codec sessions in SDP, the RTP clock rate in the "a=rtpmap" attribute shall specifically be set to 16000. This ensures consistency and proper configuration for the Enhanced Voice Services codec in RTP sessions described by SDP.