Which of the following is a characteristic of Active Directory's physical structure?

• A. Site and Subnet definitions
• B. Domain and Forest boundaries
• C. Group Policy architecture
• D. Replication topology between sites

Answer: (D)

Active Directory’s physical structure centers on where domain controllers sit in the network and how their data is moved between locations. The replication topology between sites specifically defines how intersite data is propagated—how site links connect sites, which path data takes between domain controllers, and the schedule and bandwidth used for replication. This arrangement is guided by the actual network layout, ensuring updates flow efficiently across geographic locations while respecting WAN constraints. The other items describe logical aspects—domain/forest boundaries for trust and scope, or how policies are applied—rather than how replication happens across the physical network.