How should an administrator manually validate the DNS readiness of a customer network?

What guideline should be followed when planning bandwidth between sites hosting VM objects and the witness nodes?
An implementation engineer is tasked with setting up RecoverPoint for VMs on a new 4-node E Series VxRail duster How many VMs are licensed to be protected on the cluster?
A VxRail Manager VM must be configured as follows:
* IP address: 192 168.10.16
* Net mask: 255.255.255.0
* Gateway: 192 168 10 254
Which command must be used?