Adobe Flash Media Server is software that focuses on being a streaming server and data to the Flash Platform helps by providing a better and richer experience for the user. Adobe today announced a new family Flash Media Server 4, with innovations such as Dynamic IP multicast, HTTP Streaming and of course, RTMFP(Real Time Media Flow Protocol) 
Adobe Flash Media Server 4 Family
The family Flash Media Server 4 now includes the following members:
- Adobe Flash Media Streaming Server 4 – For streaming live or on demand, with the possibility of using encrypted content with RTMP (RTMPE) and check SWF.
- Adobe Flash Media Interactive Server 4 – Same features as the FMSS with adding new features as IP multicast and HTTP Dynamic Streaming
- Adobe Flash Media Enterprise Server 4 – to provide content on a large scale with little network usage and maximum performance.
Adobe Flash Media Development Server software contains all the features in Adobe Flash Media Enterprise Server 4 software, but with a limit of 10 simultaneous RTMP connections and 50 simultaneous RTMFP connections, and time limits for IP multicast and live HTTP Dynamic Streaming.
http://www.adobe.com/products/flashmediaserver/
http://blogs.adobe.com/ktowes/2010/09/announcing-flash-media-server-4.html
http://blogs.adobe.com/conversations/2010/09/adobe-debuts-new-technologies-and-improved-video-workflows-at-ibc-flash-media-server-4-announced.html
