SSM versus ISM
SSM does not support unmodified Applications!
No way to request reception of traffic from unknown sources Existing receiver applications will not work with SSM !
New terminology:
A group G alone has no meaning of it’s own in SSM. It is like the trailing digits in a telephone number !
Service Model: RFC1112 Source-Specific Network Abstraction: group channel Identifier: G S,G Receiver Operations: join, leave subscribe, unsubscribe