SRM (A) automates and orchestrates failover; stretch clusters enable cross-site vMotion for resilience (C); and testing DR in a controlled environment (D) ensures readiness. Storing backups only on local host datastores (B) creates a single point of failure and is not recommended.

The "Ensure Accessibility" option ensures that all data remains accessible during maintenance while minimizing the impact on performance and data migration.
The administrator must navigate to the vSAN cluster in the vSphere Client to select the host for maintenance mode.
Right-clicking the host and selecting "Enter Maintenance Mode" is the standard action for placing a host into maintenance mode.

VMware supports VMFS (on block storage), NFS (file-based), and vSAN (distributed storage). CIFS (option C) is typically not used to host VMware virtual disks.

Network IO Control (NIOC) must be enabled on the Virtual Distributed Switch (VDS) via the vSphere Client to begin configuring and managing bandwidth allocation and prioritization for different types of traffic.
After enabling NIOC, you can assign shares and limits to the specific port group (in this case, for storage traffic) to prioritize the traffic over other types of network traffic.