One port is used to carry content (say a video track) and the second (the RTCP port) is mainly used as a feedback mechanism to report on quality and packet loss.

一个端口是用于携带内容(比如视频轨道)，第二个主要(服务器端口)作为一种反馈机制报告质量和包丢失。

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RTP transmit data, and RTCP provide feedback of data transmission quality. RSVP can reserve network bandwidth to guarantee quality of service. RTSP remotely control data transmission.

其中RTP协议负责数据传输，RTCP协议负责提供数据传输质量反馈，RSVP协议用于资源预留，以保证网络服务质量，RTSP协议则提供数据传输的远端控制。

youdao

RTP transmit data, and RTCP provide feedback of data transmission quality. RSVP can reserve network bandwidth to guarantee quality of service. RTSP remotely control data transmission.

其中RTP协议负责数据传输，RTCP协议负责提供数据传输质量反馈，RSVP协议用于资源预留，以保证网络服务质量，RTSP协议则提供数据传输的远端控制。

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