option routers指定TFTP服务器的地址，前提是将路由器配置为在网络中不将TFTP服务器请求转发到TFTP服务器。
Option routers specifies the address of your TFTP server if your routers are configured in such a way that the TFTP server request is not forwarded on the network to the TFTP server.
目前每个星系仅请求1个全局的(指空间上)2级星系范围网络而伴随着太空深处的永久空间站的建立该地址空间可能已经逐渐耗尽。
There is still only 1 global (spatial) level 2 galaxy wide network required for this galaxy, although the establishment of permanent space stations in deep space may start to exhaust this.
当一个网络中的设备发出去一个广播ARP请求时，它只是简单的相信当收到一个ARP响应时，这个响应真的是来自正确的设备(因为按照协议只有IP地址对应的设备才会发出相应报文，译者注)。
When a networked device sends an ARP request, it simply trusts that when the ARP reply comes in, it really does come from the correct device.
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