How DHCP Works: From Discovery to Lease Renewal
How DHCP works decides whether your device gets online at all. See the four-message DORA handshake, the lease timers running behind your connection, and the one setting home labbers get wrong.
IP Addresses
169.254.x.x Explained: The APIPA Address That Means DHCP Failed
A 169.254.x.x address means your device could not reach DHCP and self-assigned an APIPA address, so it has no internet. Here is what that means and how to fix it on Windows, Mac, and Linux.