169.254.0.0/16 - This is the "link local" block. As described in
[RFC3927], it is allocated for communication between hosts on a
single link. Hosts obtain these addresses by auto-configuration,
such as when a DHCP server cannot be found.
一个网络接口被配置了 DHCP 但是 DHCP 服务器并没有为其分配 IP 的话,这个接口就会自动给自己分配这个称为 link-local IPv4 address 的地址,或者用微软的叫法称为 Automatic Private Internet Protocol Addressing (APIPA).