[Sip-implementors] Significance of Route, Record-Route and Path Header Field

[Hemant Pandey]

Hi All         I am confused between Route, Record-Route and path Header fields.I am not able to understand their significance and their need in different SIP messages. It seems the these header fields contain duplicate copy of same information.   Could any one help me out to understand significance of these Header fields? Why and when these different Header fields required? Can't a single Header field (Route or Record-Route or Path) solve the purpose of all three header fields? what problems will arise if any one of these header field is missing?   I need ur cooperation to understand these points.   Regards   Hemant