CS0-003 Practice Question: TLS 1.0 is a deprecated and insecure protocol.
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: tLS 1.0 is a deprecated and insecure protocol.. 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 business prioritization, Which recommendation gives the best risk-based order of work?
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 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 This eliminates false positives from automated scanners that may rely on banner grabbing or outdated fingerprints, and directly confirms whether the service accepts TLS 1.0 handshakes at the protocol level.
Key principle: TLS 1.0 is a deprecated and insecure protocol.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
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.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume the scanner's automated result is always accurate and choose to change severity or remove the finding, rather than understanding that validation through independent protocol negotiation is the required step before any risk-based prioritization.
Detailed technical explanation
How to think about this question
TLS 1.0 is defined in RFC 2246 and is considered deprecated due to vulnerabilities like POODLE (CVE-2014-3566) and BEAST (CVE-2011-3389). A scanner may flag TLS 1.0 if it detects the server's supported cipher suites or protocol version in the ServerHello during a handshake, but a service owner may have disabled it via registry keys (e.g., Schannel on Windows) or OpenSSL configuration, yet the scanner might still see remnants from a load balancer or intermediate proxy. Manual testing with a command like `openssl s_client -connect host:port -tls1` definitively shows whether the server responds to a TLS 1.0 ClientHello.
KKey Concepts to Remember
TLS 1.0 is a deprecated and insecure protocol.
Manual validation confirms actual service behavior.
Automated scan findings require verification, not dismissal.
Direct testing with a TLS client provides definitive proof.
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
TLS 1.0 is a deprecated and insecure protocol.
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.
Vulnerability Management — This question tests Vulnerability Management — TLS 1.0 is a deprecated and insecure protocol..
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 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.
What should I do if I get this CS0-003 question wrong?
Review tLS 1.0 is a deprecated and insecure protocol., 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?
TLS 1.0 is a deprecated and insecure protocol.
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Question Discussion
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