Wikipedia
In a computer network, a link-local address is a network address that is valid only for communications within the network segment or the broadcast domain that the host is connected to Link-local addresses are most often assigned automatically through a process known as stateless address autoconfiguration or link-local address autoconfigurationLink-local addresses are not guaranteed to be unique beyond their network segment, therefore routers do not forward packets with link-local addresses IPv4 link-local addresses are assigned to address block 16925400/16 (16925400 through 169254255255) In IPv6, they are assigned the address block fe80::/10
Link-local address - Wikipedia, the free encyclopedia