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The IP and SMTP replication protocols used by Active Directory to replicate the AD DS database between sites have already been introduced. Table 3.2 provides additional comparative details on the two replication protocols.
| Characteristic | RPC over IP | SMTP |
|---|---|---|
| Data replicated | All AD DS partitions | Configuration and schema partitions only |
| Where used | Intersite and intrasite | Intersite only |
| Certification authority required | No | Yes |
| Scheduling | Can be scheduled (synchronous) | Cannot be scheduled (asynchronous) |