CCNP Virtual Machines and Hypervisors Practice Question
This 350-401 practice question tests your understanding of virtual machines and hypervisors. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
An architect is designing a virtualized environment for network functions that require direct access to physical NICs for performance. The hypervisor must support PCI passthrough. Which hypervisor type is best suited for this requirement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Type 1 hypervisor (e.g., VMware ESXi or KVM).
A Type 1 hypervisor (bare-metal) runs directly on the hardware and has direct access to physical resources, including PCIe devices. It supports PCI passthrough (e.g., Intel VT-d or AMD IOMMU), which allows a virtual machine to directly access a physical NIC without hypervisor intervention, maximizing performance for network functions. VMware ESXi and KVM are common Type 1 hypervisors that implement this capability.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Type 1 hypervisor (e.g., VMware ESXi or KVM).
Why this is correct
Type 1 hypervisors have direct hardware control and support PCI passthrough.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Type 2 hypervisor (e.g., VirtualBox or VMware Workstation).
Why it's wrong here
Type 2 hypervisors run on a host OS and often lack native PCI passthrough support.
✗
Container runtime (e.g., Docker).
Why it's wrong here
Containers share the host kernel and do not support PCI passthrough in the same way.
✗
Bare-metal server without virtualization.
Why it's wrong here
This is not a hypervisor and does not support VMs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between Type 1 and Type 2 hypervisors, and the trap here is that candidates may assume any hypervisor can support PCI passthrough, overlooking the architectural overhead of Type 2 hypervisors that prevents direct hardware access.
Detailed technical explanation
How to think about this question
PCI passthrough relies on hardware-assisted I/O virtualization (Intel VT-d or AMD-Vi) to map a physical PCIe device directly into a VM's memory space, bypassing the hypervisor's I/O stack. This reduces overhead to near-native performance, critical for DPDK-based network functions or high-speed packet processing. In contrast, paravirtualized NICs (e.g., virtio) still incur some overhead due to the hypervisor's involvement in I/O operations.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-401 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Virtual Machines and Hypervisors — This question tests Virtual Machines and Hypervisors — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Type 1 hypervisor (e.g., VMware ESXi or KVM). — A Type 1 hypervisor (bare-metal) runs directly on the hardware and has direct access to physical resources, including PCIe devices. It supports PCI passthrough (e.g., Intel VT-d or AMD IOMMU), which allows a virtual machine to directly access a physical NIC without hypervisor intervention, maximizing performance for network functions. VMware ESXi and KVM are common Type 1 hypervisors that implement this capability.
What should I do if I get this 350-401 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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