DP协议使用端口号为不同的应用保留其各自的数据传输通道。数据发送一方（可以是客户端或服务器端）将UDP数据报通过源端口发送出去，而数据接收一方则通过目标端口接收数据。有的网络应用只能使用预先为其预留或注册的静态端口；而另外一些网络应用则可以使用未被注册的动态端口。因为UDP报头使用两个字节存放端口号，所以端口号的有效范围是从0到65535。可以进行聊天的哦 ！-DP protocol uses port numbers for different applications to retain their respective data transmission channel. Data distribution side (can be client or server-side) will be UDP datagram sent through the source port, and the data receiving side receives data through the target port. Some network applications can only use their pre-reserved or registered a static port　and other network applications are not registered you can use the dynamic port. Because the UDP header using the two bytes stored port number, so the port number valid range is from 0-65535. Oh can chat!