vLCM Image Prerequisites — ESXi Version and Reference Host Requirements
A vSphere administrator wants to enable vLCM image-based management for an existing cluster that currently uses baseline-based remediation. Which TWO prerequisites must be met before the migration can proceed?
Quick Answer
A single reference host representing the desired state being required is correct because vLCM's image-based model works fundamentally differently from baseline-based patching: instead of applying a list of individual patches or updates, it captures an entire host's software stack, including ESXi version, vendor add-on, firmware, and driver components, as one image specification, and it needs a concrete example of that target state to build from. Selecting a reference host lets vLCM extract that host's current configuration and turn it into the cluster's desired image, which every other host in the cluster will then be reconciled against during remediation. This is a fundamentally different starting point than baseline-based management, where administrators attach separate patch and upgrade baselines without ever designating one host as the template for everything else. Migrating an existing baseline-managed cluster to image-based management means establishing that image specification for the first time, and using a reference host is the standard way to do that rather than building a specification manually from scratch. When a question describes moving from baseline-based to image-based management, expect the correct prerequisites to involve establishing what the target image actually is, whether via a reference host or an explicitly defined specification, rather than anything related to individual baseline attachments or patch lists.
⚠ Common exam trap
Many exam-takers think all hosts must have identical hardware (Option A) or that vLCM must already be enabled on a host (Option E), but the actual prerequisites are purely about ESXi version and the existence of a reference host to define the desired state.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
All ESXi hosts must be running version 7.0 U2 or later.
VLCM image-based management requires ESXi hosts to be at version 7.0 U2 or later, as the image-based lifecycle management feature was introduced in vSphere 7.0 Update 2. Option D is correct because a single reference host must be selected to define the desired software image for the cluster, which vLCM then uses to ensure all hosts match that specification.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
All hosts must have the same hardware compatibility (HCL).
Why it's wrong here
Heterogeneous hardware is allowed if the image includes the necessary drivers and firmware components.
- ✓
All ESXi hosts must be running version 7.0 U2 or later.
Why this is correct
vLCM image-based management is only available on ESXi 7.0 Update 2 and newer.
- ✗
The vCenter Server must be registered with VMware Cloud.
Why it's wrong here
vLCM works on-premises without VMware Cloud registration.
- ✓
The cluster must have a single reference host that represents the desired state.
Why this is correct
A reference host is used to generate the cluster image specification.
- ✗
The cluster must have at least one host with vSphere Lifecycle Manager enabled.
Why it's wrong here
Enabling vLCM on a host is part of the migration process, not a prerequisite.
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Same concept, more angles
1 more way this is tested on VCP-DCV
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A vSphere administrator is moving from baseline-based to image-based management for a cluster. The administrator has detached all baselines and is now ready to attach an image. Which TWO conditions must be met before attaching an image to the cluster? (Choose two.)
medium- A.The vCenter Server must be running the latest version of vSphere Lifecycle Manager.
- B.The cluster must be empty of any virtual machines.
- ✓ C.The cluster must have at least one host that is compatible with the selected image.
- ✓ D.All hosts in the cluster must be in a connected state.
- E.The cluster must not have any pending remediation tasks.
Why C: Options C and D are correct. For attaching an image to a cluster, the cluster must have at least one host that is compatible with the selected image (C) to ensure the image can be applied. Additionally, all hosts in the cluster must be in a connected state (D) so that vSphere Lifecycle Manager can manage them. Option A is incorrect because the vCenter Server does not need to be running the latest version of vLCM; image-based management is supported in vSphere 7.0 and later, but not specifically 'the latest'. Option B is incorrect because the cluster can contain virtual machines; image-based management does not require an empty cluster. Option E is incorrect because pending remediation tasks do not block attaching an image; they may be addressed later.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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