The correct answer is to manually test the service with a TLS client or scanner profile that negotiates protocol versions. This is the best validation method because it provides direct, empirical evidence of whether the server actually accepts TLS 1.0 connections, bypassing any potential misconfigurations or false positives in the original scan. When a service owner disagrees with a scanner finding, relying solely on their assertion or the scanner’s log is insufficient; only an independent test using a tool like OpenSSL s_client can confirm the server’s true behavior. On the CompTIA CySA+ CS0-003 exam, this scenario tests your understanding of the validation phase in vulnerability management, where you must distinguish between a true positive and a false positive. A common trap is to accept the owner’s word or simply rescan with the same tool, which may repeat the same error. Remember the mnemonic “Test, Don’t Trust”—always verify protocol support with a manual client before closing or downgrading any finding.
CS0-003 Vulnerability Management Practice Question
This CS0-003 practice question tests your understanding of vulnerability management. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: manual testing provides definitive proof of protocol support.. 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.
A scanner flags TLS 1.0 on a server, but the service owner says TLS 1.0 is disabled. What is the BEST validation method? For validation, Which action should be taken before closing or downgrading the finding?
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
✓
Manually test the service with a TLS client or scanner profile that negotiates protocol versions
Option D is correct because the only way to definitively resolve a discrepancy between a scanner finding and a service owner's claim is to perform an independent, manual test. Using a TLS client (e.g., OpenSSL s_client) or a scanner profile that specifically negotiates protocol versions allows you to directly verify whether the server actually accepts TLS 1.0 connections, eliminating false positives or misconfigurations.
Key principle: Manual testing provides definitive proof of protocol support.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Change the severity to informational automatically
Why it's wrong here
Severity should reflect verified exposure, not disagreement.
✗
Close the finding because the owner disagrees
Why it's wrong here
Owner statements need evidence before closure.
✗
Delete the server from the scan scope
Why it's wrong here
Removing assets hides risk and breaks governance.
✓
Manually test the service with a TLS client or scanner profile that negotiates protocol versions
Why this is correct
Direct protocol validation determines whether TLS 1.0 is actually accepted.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Manual testing provides definitive proof of protocol support.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the trap that candidates will trust the service owner's assertion over the scanner's evidence, leading them to close the finding without independent verification, which violates the principle of validate-before-remediate.
Detailed technical explanation
How to think about this question
Under the hood, TLS 1.0 uses a different record layer version (0x03,0x01) and cipher suites than later versions. A manual test with OpenSSL's `openssl s_client -tls1` command forces the client to attempt a TLS 1.0 handshake; if the server responds with a ServerHello, TLS 1.0 is enabled. In real-world scenarios, a server might have TLS 1.0 disabled at the OS level but still enabled in a load balancer or reverse proxy, making manual testing essential.
KKey Concepts to Remember
Manual testing provides definitive proof of protocol support.
TLS clients or specialized scanner profiles can force protocol negotiation.
OpenSSL's `s_client` is a common tool for manual TLS testing.
Validation prevents false positives and ensures accurate risk assessment.
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
Manual testing provides definitive proof of protocol support.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CS0-003 question in full detail.
Review manual testing provides definitive proof of protocol support., then practise related CS0-003 questions on the same topic to reinforce the concept.
Vulnerability Management — This question tests Vulnerability Management — Manual testing provides definitive proof of protocol support..
What is the correct answer to this question?
The correct answer is: Manually test the service with a TLS client or scanner profile that negotiates protocol versions — Option D is correct because the only way to definitively resolve a discrepancy between a scanner finding and a service owner's claim is to perform an independent, manual test. Using a TLS client (e.g., OpenSSL s_client) or a scanner profile that specifically negotiates protocol versions allows you to directly verify whether the server actually accepts TLS 1.0 connections, eliminating false positives or misconfigurations.
What should I do if I get this CS0-003 question wrong?
Review manual testing provides definitive proof of protocol support., then practise related CS0-003 questions on the same topic to reinforce the concept.
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?
Manual testing provides definitive proof of protocol support.
About these practice questions
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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 scanner flags TLS 1.0 on a server, but the service owner says TLS 1.0 is disabled. What is the BEST validation method? For business prioritization, Which recommendation gives the best risk-based order of work?
hard
✓ A.Manually test the service with a TLS client or scanner profile that negotiates protocol versions
B.Delete the server from the scan scope
C.Change the severity to informational automatically
D.Close the finding because the owner disagrees
Why A: Option A is correct because the best validation method is to independently verify the server's TLS configuration by manually testing with a TLS client (e.g., OpenSSL s_client) or a scanner profile that explicitly attempts to negotiate TLS 1.0. This eliminates false positives from automated scanners that may rely on banner grabbing or outdated fingerprints, and directly confirms whether the service accepts TLS 1.0 handshakes at the protocol level.
Variation 2. A scanner flags TLS 1.0 on a server, but the service owner says TLS 1.0 is disabled. What is the BEST validation method? For stakeholder management, Which documentation or approval is required to keep the programme defensible?
hard
A.Close the finding because the owner disagrees
✓ B.Manually test the service with a TLS client or scanner profile that negotiates protocol versions
C.Change the severity to informational automatically
D.Delete the server from the scan scope
Why B: Option B is correct because the scanner may have detected TLS 1.0 due to a false positive from a misconfigured cipher suite or a server-side protocol negotiation artifact. Manually testing with a TLS client (e.g., OpenSSL s_client -tls1) or a scanner profile that explicitly negotiates protocol versions provides definitive evidence of whether TLS 1.0 is actually enabled, resolving the discrepancy between the scanner result and the owner's claim.
Variation 3. A scanner flags TLS 1.0 on a server, but the service owner says TLS 1.0 is disabled. What is the BEST validation method? For tool configuration, Which scanner or pipeline change most directly improves result quality?
hard
A.Change the severity to informational automatically
B.Delete the server from the scan scope
C.Close the finding because the owner disagrees
✓ D.Manually test the service with a TLS client or scanner profile that negotiates protocol versions
Why D: Option D is correct because the most reliable way to validate whether TLS 1.0 is truly disabled is to perform an active, negotiated test using a TLS client (e.g., OpenSSL s_client) or a scanner profile that explicitly attempts to connect using only TLS 1.0. This bypasses any potential misconfiguration in the scanner's service detection or version negotiation logic, and directly confirms whether the server accepts a TLS 1.0 handshake. Relying solely on the scanner's banner grab or the owner's assertion can miss cases where the server still supports the protocol on certain ports or under specific cipher suites.
Variation 4. A scanner flags TLS 1.0 on a server, but the service owner says TLS 1.0 is disabled. What is the BEST validation method? For control selection, Which control best addresses the stated weakness without hiding risk?
hard
A.Close the finding because the owner disagrees
B.Change the severity to informational automatically
C.Delete the server from the scan scope
✓ D.Manually test the service with a TLS client or scanner profile that negotiates protocol versions
Why D: Option D is correct because the best validation method is to manually test the service using a TLS client (e.g., OpenSSL s_client) or a scanner profile that explicitly attempts to negotiate TLS 1.0. This directly verifies whether the server truly rejects TLS 1.0 handshakes, eliminating false positives from scanner misconfiguration or version negotiation quirks. Relying on the owner's assertion or altering the finding without technical proof would violate vulnerability management best practices.
Last reviewed: Jun 11, 2026
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