The answer is that vSphere Enhanced vMotion Compatibility (EVC) masks CPU features to a baseline level across all hosts in the cluster. This works by presenting a common set of CPU instruction sets to virtual machines, effectively hiding the differences between older and newer processor generations so that VMs can migrate seamlessly via vMotion without encountering compatibility errors. On the VMware Certified Professional Data Center Virtualization VCP-DCV exam, this concept tests your understanding of how EVC enables cluster-wide workload mobility while avoiding the trap of confusing it with memory-related features or assuming it requires VMs to be powered off—EVC can be enabled with running VMs, though a brief compatibility check occurs. A common memory tip is to think of EVC as a “CPU mask” that levels the playing field across hosts, not a per-host setting but a cluster-wide baseline.
VCP-DCV vSphere Architecture, Products and Solutions Practice Question
This VCP-DCV practice question tests your understanding of vsphere architecture, products and solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which two of the following are characteristics of the vSphere Enhanced vMotion Compatibility (EVC) feature? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It allows vMotion between hosts of different CPU generations within the same cluster
Options B and C are correct. EVC masks CPU features to ensure compatibility across hosts of different generations. Option A is incorrect because EVC does not affect memory. Option D is incorrect because EVC does not require manual power-off; you can enable EVC with VMs powered on. Option E is incorrect because EVC is per-cluster, not per-host.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
It is configured at the host level
Why it's wrong here
EVC is a cluster-level setting.
✓
It allows vMotion between hosts of different CPU generations within the same cluster
Why this is correct
EVC enables vMotion across different CPU generations by masking features.
It requires all VMs to be powered off before enabling
Why it's wrong here
EVC can be enabled while VMs are powered on.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related VCP-DCV subnetting questions on CIDR, address ranges, and subnet selection.
vSphere Architecture, Products and Solutions — This question tests vSphere Architecture, Products and Solutions — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: It allows vMotion between hosts of different CPU generations within the same cluster — Options B and C are correct. EVC masks CPU features to ensure compatibility across hosts of different generations. Option A is incorrect because EVC does not affect memory. Option D is incorrect because EVC does not require manual power-off; you can enable EVC with VMs powered on. Option E is incorrect because EVC is per-cluster, not per-host.
What should I do if I get this VCP-DCV question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related VCP-DCV subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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