Hi, I am using ns to do some simulation related to RTP protocol. In the file (in the latest version, March 99) ~ns/session-rtp.cc it says that the size of a Receiver Report is 48 : #define RTCP_RR_SIZE 48 But when I look at the RTP Spec, I count it as being 24 bytes. Am I missing something or there is an error about it? Thanks, Kamil.