I did an article some time ago about how DHCP leases work. From that, I’ve gotten a number of questions about why, after you click on Renew DHCP Lease in the Network System Preference pane, you sometimes see the information until you get a new lease. You can also reset the lease from the command line, which does not usually show you a new lease in the GUI immediately. To reset the DHCP lease from the command line, use ipconfig: ipconfig set en0 BOOTP ipconfig set en0 DHCP If the information is displayed on the screen, then it has to be stored somewhere, right? When your system sends an acceptance…