A 169.254.x.x address indicates DHCP failure caused by physical disconnections, a down or exhausted DHCP server, misconfigured VLANs/relays, a stopped DHCP Client service, faulty drivers, IP conflicts, or blocked ports. To resolve it: restart your router/switch, run ipconfig /release and /renew, ensure the DHCP Client service is running, reset the network stack with netsh winsock reset and netsh int ip reset, and update your driver. As a temporary fix, assign a static IP manually; for permanent resolution, network administrators must check the DHCP server's status, pool availability, and relay/VLAN settings.