You're a consultant for a large enterprise that needs a comprehensive IP addressing and DNS management solution for its physical and virtual networks. The enterprise has a primary office in Pittsburgh and three branch offices in Los Angeles, New York, and Miami. It has IT support staff only in the branch offices. The enterprise's server specialists are located in Pittsburgh. The IT directory in Pittsburgh wants to offload some of the IPAM management functions to some of the IT staff without giving them broader domain or forest administrative right. Which type of IPAM architecture do you recommend? Which features of IPAM are you likely to recommend using to address the requirements?