A snapshot is a feature that can be used in hypervisors to:

A hypervisor snapshot captures the complete state of a virtual machine (VM)—including its memory, settings, and virtual disks—at a specific point in time. This creates a restore point. The primary purpose is to allow an administrator to revert the VM to this saved state if subsequent changes, like software updates or configuration modifications, cause problems. This action is fundamentally about restoring the VM to a previous, known-good version.

A. Snapshots operate on the virtual machine's state, not the physical host's or hypervisor's firmware.
C. While reverting a snapshot can roll back drivers, its function encompasses the entire VM state, not just drivers.
D. Snapshots are not true backups; they depend on the original base disk and are not a long-term data protection solution.

1. VMware vSphere Documentation, "Managing Virtual Machine Snapshots," Section: "How Snapshots Work." VMware, Inc. Accessed October 2023. The documentation states, "A snapshot preserves the state and data of a virtual machine at a specific point in time... You can revert a virtual machine to a previous state if you take a snapshot of that state."

2. Microsoft Hyper-V Documentation, "Checkpoints and snapshots overview," Section: "What checkpoints are." Microsoft Corporation, September 22, 2023. The document states, "Checkpoints are a 'point in time' image of a virtual machine... Checkpoints allow you to revert the virtual machine to a previous state."

3. Red Hat Enterprise Linux 8 Documentation, "Chapter 27. Managing virtual machine snapshots," Section 27.1. "Introduction to snapshots." Red Hat, Inc. Accessed October 2023. It explains, "A virtual machine (VM) snapshot is a file-based representation of the state of a VM at a particular point in time... This is useful for reverting the VM to a desired state."