It is not very often that I see these three subjects combined in one post. But from a network automation perspective we know that it is so true, that you cannot design a proper network without these three, the trifecta. I really like the following comparison:
I once heard an engineer compare IPAM to a city planning system, with houses, streets and cars representing devices, network layers and traffic. It seemed so orderly, so reasonable … and also entirely incomplete. Houses don’t move around from lot to lot; developers don’t build multiple streets to the same properties; homes have only one address; people don’t transport phone calls in the trunks of cars; and the post office has never been an authoritative DHCP server.