The correct remediation is to reissue the server certificate so the subject or SAN matches pay.example.net and chain it to a trusted CA. This resolves the browser certificate warning because the warning is triggered by a hostname mismatch—the certificate’s Common Name or Subject Alternative Name does not match the domain the user is visiting—or because the certificate was issued by an untrusted certificate authority. On the Security+ SY0-701 exam, this scenario tests your understanding of PKI trust models and certificate validation errors, often appearing as a performance-based question where you must choose between reissuing, installing an intermediate CA, or disabling validation. A common trap is to think adding a self-signed certificate or bypassing the warning is acceptable, but that weakens security. Remember the mnemonic “SAN matches the site, chain to a CA that’s right”—if the domain doesn’t match or the CA isn’t trusted, reissue is the only fix that preserves full certificate validation.
SY0-701 General Security Concepts Practice Question
This SY0-701 practice question tests your understanding of general security concepts. 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. 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.
Exhibit
$ openssl s_client -connect pay.example.net:443 -servername pay.example.net
CONNECTED(00000003)
depth=0 CN = portal.example.net
verify error:num=62:hostname mismatch
verify return:1
---
Certificate chain
0 s:CN = portal.example.net
i:CN = Example Issuing CA
a:PKEY: rsaEncryption, 2048 (bit)
Not After : May 10 2026
---
Based on the exhibit, users report that the new payment portal opens only after they bypass a browser warning. Which remediation best restores secure access without weakening certificate validation?
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.
$ openssl s_client -connect pay.example.net:443 -servername pay.example.net
CONNECTED(00000003)
depth=0 CN = portal.example.net
verify error:num=62:hostname mismatch
verify return:1
---
Certificate chain
0 s:CN = portal.example.net
i:CN = Example Issuing CA
a:PKEY: rsaEncryption, 2048 (bit)
Not After : May 10 2026
---
A
Install the same certificate on every client so the browser warning is suppressed.
Why wrong: Client-side certificate installation does not fix a hostname mismatch on the server certificate. It only changes trust on endpoints and can create maintenance problems.
B
Reissue the server certificate so the subject or SAN matches pay.example.net and chain it to the trusted CA.
A valid server certificate must match the hostname users are connecting to, and it must chain to a trusted issuing authority. Reissuing the certificate for pay.example.net resolves the mismatch shown in the exhibit while preserving proper certificate validation.
C
Disable certificate name checking in the browser until the certificate expires.
Why wrong: Disabling validation removes an important security check and makes man-in-the-middle attacks easier. It trades away authenticity to hide the symptom.
D
Replace TLS with a shared symmetric key configured on the web server and all users.
Why wrong: A shared symmetric key is not practical for public web access and would not provide the same authentication properties as PKI-based TLS certificates.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Reissue the server certificate so the subject or SAN matches pay.example.net and chain it to the trusted CA.
The browser warning indicates a hostname mismatch or untrusted CA. Reissuing the server certificate with the correct subject or SAN (Subject Alternative Name) matching pay.example.net and chaining it to a trusted CA resolves the warning while maintaining full certificate validation. This ensures the browser can verify both the identity and trustworthiness of the server without weakening security.
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.
✗
Install the same certificate on every client so the browser warning is suppressed.
Why it's wrong here
Client-side certificate installation does not fix a hostname mismatch on the server certificate. It only changes trust on endpoints and can create maintenance problems.
✓
Reissue the server certificate so the subject or SAN matches pay.example.net and chain it to the trusted CA.
Why this is correct
A valid server certificate must match the hostname users are connecting to, and it must chain to a trusted issuing authority. Reissuing the certificate for pay.example.net resolves the mismatch shown in the exhibit while preserving proper certificate validation.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable certificate name checking in the browser until the certificate expires.
Why it's wrong here
Disabling validation removes an important security check and makes man-in-the-middle attacks easier. It trades away authenticity to hide the symptom.
✗
Replace TLS with a shared symmetric key configured on the web server and all users.
Why it's wrong here
A shared symmetric key is not practical for public web access and would not provide the same authentication properties as PKI-based TLS certificates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think installing the same certificate on clients (Option A) is a valid fix, but this violates certificate security by exposing the private key and does not address the root cause of the hostname mismatch.
Detailed technical explanation
How to think about this question
Certificate validation in TLS involves checking the certificate chain up to a trusted root CA, verifying the signature, and ensuring the hostname in the URL matches the certificate's Subject Common Name (CN) or Subject Alternative Name (SAN) per RFC 2818. Modern browsers enforce SAN matching strictly; if the certificate is issued for a different domain (e.g., *.example.com instead of pay.example.net), the browser will display a name mismatch warning. Reissuing with the correct SAN and a trusted CA chain resolves this without disabling any security checks.
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 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 SY0-701 question in full detail.
General Security Concepts — This question tests General Security Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Reissue the server certificate so the subject or SAN matches pay.example.net and chain it to the trusted CA. — The browser warning indicates a hostname mismatch or untrusted CA. Reissuing the server certificate with the correct subject or SAN (Subject Alternative Name) matching pay.example.net and chaining it to a trusted CA resolves the warning while maintaining full certificate validation. This ensures the browser can verify both the identity and trustworthiness of the server without weakening security.
What should I do if I get this SY0-701 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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