Here are some protocols for streaming of Audio/Video using Flash media server and Red5.
RTMP Real Time Messaging Protocol
RTMP is a TCP based propriety protocol developed by Adobe System for the purpose of streaming Audio/Video data between Flash Player and media server.
RTMPT Real Time Messaging Protocol with Tunnel
RTMPT is a variation of RTMP which works behind the firewall as well. It works on Port 80 and encapsulate the RTMP data in HTTP request.
RTMPS Real Time Messaging Protocol Secure
RTMPS is again a variation of RTMP which works over secure HTTPS connection.
RTMPE Real Time Messaging Protocol with Encryption
RTMPE is a new 128 bit encrypted protocol developed by Adobe systems for securing the stream data between flash client and server. It's lightweight than SSL.
It's a DRM solution from Adobe for flash.
RTMPTE Real Time Messaging Protocol with Encryption and Tunnel
RTMPTE is a RTMPE tunneling over HTTP on port 80.
MRTMP Multiplex Real Time Messaging protocol
Multiplex RTMP is a protocol between edge and origin, developed by Red5 for clustering of stream data using Terracotta.
H.264 On RTMP