Much of the IP data is not useful, beyond the protocol and source/destination address information.

其中除了协议和来源/目标地址信息，其余许多 IP 数据是没有用的。

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When an application wants to send data to another host, UDP builds a header that includes a source port, a destination port which provides an address for delivering messages.

当应用软件向另一主机发送数据时，UDP协议生成一个数据头，包括源端口，目的地端口。这些端口提供为送达信息所需要的地址。

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Make an IP address from the source address and routing of data sent to the destination address may become.

一个IP地址使得将来自源地址的数据通过路由而传送到目的地址变为可能。

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