The Hyper-V Agent consists of two components:
•Hyper-V Agent Management service. The Management service is a central management component that communicates with Portal and delegates backup and restore operations to Hyper-V Agent Host services. The Management service is the only Hyper-V Agent component that directly communicates with Portal.
•Hyper-V Agent Host service. The Host service is installed on one or more hosts in a Hyper-V environment. Host services perform VM backups and restores, as delegated by the Management service. Host services do not directly communicate with Portal so there is no need to open ports between Host services and Portal. When performing a backup or restore, the Host service communicates directly with the vault where the VM is backed up.
Even though it consists of more than one component, the Hyper-V Agent appears as a single system in Portal.
Components for protecting a Hyper-V environment