When the cable is reconnected and the Network Cable Unplugged icon disappears from the taskbar, the adapter sends another media-sense event to the IP stack. The IP stack then starts an adapter initialization and configuration process.
When initialization on the adapter begins, Ipconfig reports all zeros for the IP address and subnet mask, and no default gateway.
After the adapter is initialized, it begins the process of obtaining its IP configuration from the DHCP server. After it receives a DHCP offer, it attempts to perform a conflict detection process to determine whether another computer is already using the offered IP address. At this point, approximately three seconds after the Network Cable Unplugged icon disappears from the taskbar, Ipconfig shows the IP address and subnet mask, but no default gateway.
Approximately two seconds later, when the validity of the DHCP lease has been verified, Ipconfig shows the correct IP address, subnet mask, and default gateway.