1747-SN
1747-SN
1747-SN
1747-SN
H.323和SIP分别是通信领域与因特网两大阵营推出的建议。 H.323企图把IP电话当作是众所周知的传统电话，只是传输方式发生了改变，由电路交换变成了分组交换。而SIP协议侧重于将IP电话作为因特网上的一个应用，较其实应用（如FTP，E-mail等）增加了信令和QoS的要求，它们支持的业务基本相同，也都利用RTP作为媒体传输的协议。但H.323是一个相对复杂的协议。
RTSP主要用于流媒体传输，它的英文全称是real time streaming protocol。典型的应用就是网络电视的应用，由客户向服务器进行点播，如果在监控行业应用的话，建议当用户进行远程回放录像时，可采用RTSP协议。
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