Know the four business models. The business models as identified by Microsoft are departmental, project-based , product/service-based, and cost center.
Know the four administrative models. The four administrative models are centralized, decentralized, hybrid, and outsourced.
Know the difference between centralized administration and decentralized administration. With centralized administration, the administrative staff work as a team from one central location, even if the resources are not centrally located. Decentralized administration takes advantage of having the administrative staff distributed to where the resources are located to take advantage of efficient troubleshooting and administration.
Understand how the hybrid administration model functions. The hybrid model has a core -centralized staff that controls all of the resources, whereas a technical support staff is decentralized to deal with issues that arise.
Know how the existing environment can affect the Active Directory design. The current administrative model will probably be the basis for the new implementation, however, changes may occur to the administrative models due to the ease of administration when Active Directory in introduced.
Understand how Active Directory affects the administration models. Active Directory is very flexible and can be designed to work with any of the administrative models.