众所周知，浏览器本身不支持相互之间直接建立信道进行通信，都是通过服务器进行中转。比如现在有两个客户端，甲和乙，他们俩想要通信，首先需要甲和服务器、乙和服务器之间建立信道。甲给乙发送消息时，甲先将消息发送到服务器上，服务器对甲的消息进行中转，发送到乙处，反过来也是一样。这样甲与乙之间的一次消息要通过两段信道，通信的效率同时受制于这两段信道的带宽。同时这样的信道并不适合数据流的传输，如何建立浏览器之间的点对点传输，一直困扰着开发者。WebRTC应运而生，skyRTC就是WebRTC的一个例子。(As we all know, the browser itself does not support the establishment of a direct channel between each other to communicate, are through the server to transit. For example, there are now two clients, A and B, they both want to communicate, first of all need a server, B and the establishment of a network between the server. A send a message to B, the first message sent to the server, the server on a message to transit, sent to the B Department, which is the same. So that a message between A and B through two channels, the efficiency of communication at the same time by the bandwidth of these two channels. At the same time such a channel is not suitable for data transmission, how to establish a point-to-point transmission between the browser, has been plagued by the developer. WebRTC came into being, skyRTC is an example of WebRTC.)