A vSAN network facilitates the communication between cluster hosts, and must guarantee fast performance, high availability, and bandwidth.
vSAN uses the network to communicate between the ESXi hosts and for virtual machine disk I/O.
Virtual machines (VMs) on vSAN datastores are made up of a set of objects, and each object can be made up of one or more components. These components are distributed across multiple hosts for resilience to drive and host failures. vSAN maintains and updates these components using the vSAN network.
The following diagram provides a high-level overview of the vSAN network: