The most common deployment for Site Recovery Manager is to have two sites with one vCenter Server instance per site.
The vCenter Server instances can belong to vCenter Single Sign-On domains that are either in Enhanced Linked Mode or are not in Enhanced Linked Mode.
![Site Recovery Manager in a two-site topology with one vCenter Server per Platform Services Controller](images/GUID-CC77E8E5-F593-4609-BF15-B1819226126A-high.png)