Ditto here. I tried to explain that to my professor back when I was taking networking courses. He thought I was kidding and said "there is no such thing as static DHCP, that doesn't even make sense!" He was correct for the most part, of course. Static DHCP isn't so much a standard as it is a feature found on a few products. But Cisco does have DHCP Static Mapping which I understand is the same idea. And as Ciso goes, the rest of the industry eventually follows with respect to features.