Destination host unreachable.

未知目标主机。

The destination network or destination host.

目标网络或目标主机。

A socket operation failed because the destination host was down.

套接字操作因为目的主机关闭而失败返回。

A socket operation failed because the destination host was down.

将套接字连接到指定主机的指定端口。

This process is repeated until the datagram can be delivered to its destination host.

这个过程将反复进行，直到能够将数据报传递到其目的地主机为止。