This CV0-004 practice question tests your understanding of security. 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.
An organization uses a private cloud and wants to implement multifactor authentication (MFA) for administrative access to the hypervisor. However, due to legacy system constraints, the hypervisor does not support MFA directly. What is the BEST alternative to achieve MFA for administrative logins?
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
✓
Deploy a jump host (bastion host) with MFA, and restrict hypervisor access to only that host.
A jump host (bastion host) can be placed in a separate network segment that requires MFA for access. Administrators log into the jump host first and then connect to the hypervisor from it. Direct SSH keys still rely on single-factor authentication. A VPN without MFA is insufficient. Using a certificate alone is also single factor.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Configure SSH key-based authentication for all hypervisor logins.
Why it's wrong here
SSH keys are considered something you have, but without a second factor, it's still single-factor authentication.
✗
Implement a certificate-based authentication scheme for the hypervisor.
Why it's wrong here
Certificates alone are a single factor; MFA requires at least two different factors.
✗
Set up a VPN that requires MFA and allow only VPN traffic to reach the hypervisor.
Why it's wrong here
VPN with MFA protects the network connection, but once connected, the hypervisor login itself lacks MFA.
✓
Deploy a jump host (bastion host) with MFA, and restrict hypervisor access to only that host.
Why this is correct
This layers MFA at the entry point, and the hypervisor access is limited to a secured intermediary.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CV0-004 NAT questions on configuration and troubleshooting.
Security — This question tests Security — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Deploy a jump host (bastion host) with MFA, and restrict hypervisor access to only that host. — A jump host (bastion host) can be placed in a separate network segment that requires MFA for access. Administrators log into the jump host first and then connect to the hypervisor from it. Direct SSH keys still rely on single-factor authentication. A VPN without MFA is insufficient. Using a certificate alone is also single factor.
What should I do if I get this CV0-004 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CV0-004 NAT questions on configuration and troubleshooting.
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?
Static NAT maps one inside address to one outside address.
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