SIP: Simple Internet Protocol
S. Deering · IEEE Network · 1993
Several features of the Simple Internet Protocol (SIP) are described and compared to those offered by the Internet Protocol (IP). The changes required for other protocols in the TCP/IP suite to accommodate SIP are discussed, as are the mechanisms available to allow gradual transition of the Internet from IP to SIP. Future directions for SIP development, a report on current implementation status, and a summary of the specific improvements offered by SIP over IP are presented.>