Data source address.

数据源地址。

Enter a mask for the source address.

请为这个源地址输入一个掩码。

4 bytes of source address to notify who sent it.

个字节的源地址表示发送方。

The source address on the packet is an outside global address.

数据包中的源地址是一个外部全局地址。

The loopback address (127.0.0.1) is not a valid source address.

环回地址（127.0.0.1）不是一个有效的源地址。