The purpose of this article is to show the high level architecture for Zerto Virtual Replication with the Disaster Recovery as a Service (DRaaS) model. This includes Zerto Virtual Replication components, necessary infrastructure components, and port connections between components.
The following diagram shows the basic DRaaS architecture. DRaaS organizations can manage their disaster recovery via the Zerto User Interface. The diagram shows two users, both using VMware environments. These organizations can use either VMware vSphere or Microsoft SCVMM to connect to the Cloud Service Provider.
Fore more info please refer to : Design Considerations for DRaaS