Question 721 of 750

Browser and Application Security →mediumMultiple ChoiceObjective-mapped

SSL Certificate Error: Different Domain Indicates MITM

This 220-1202 practice question tests your understanding of browser and application 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.

A user reports that their browser displays a warning saying 'Your connection is not private' when visiting a frequently used banking site. After checking, you see the certificate error is for a different domain. What is the most likely cause?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
The user's system date and time are incorrect
Why wrong: Incorrect date/time causes certificate validity errors, but the error would be for the same domain, not a different one.
B
The website's SSL certificate has expired
Why wrong: An expired certificate would show an error for the correct domain, not a different domain.
C
A malicious proxy or DNS hijacking is redirecting traffic to a fake site
A man-in-the-middle attack can present a certificate for a different domain, indicating redirection to a fraudulent site.
D
The browser needs to be updated to the latest version
Why wrong: Browser updates fix vulnerabilities but do not cause certificate domain mismatches.

Full breakdown with real-world context →

Quick Answer

The answer is a malicious proxy or DNS hijacking redirecting traffic to a fake site. This is correct because when a browser warns that a certificate is for a different domain, it means the server presenting the certificate is not the legitimate owner of the site you intended to visit—a classic sign of a man-in-the-middle attack where an attacker intercepts the connection and serves a fraudulent certificate. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your ability to distinguish between a simple expired certificate and a security breach; the trap is assuming the error is just a misconfiguration. The key insight is that a domain mismatch in the certificate is far more dangerous than a date mismatch. Memory tip: “Domain mismatch? Danger—someone’s in the middle.”

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

A malicious proxy or DNS hijacking is redirecting traffic to a fake site

The certificate error for a different domain indicates that the browser is being directed to a server whose SSL certificate does not match the expected banking site's domain. This is a classic sign of a man-in-the-middle attack, often caused by malicious proxy or DNS hijacking, where traffic is redirected to a fraudulent server presenting a certificate for a different domain.

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.

✗
The user's system date and time are incorrect
Why it's wrong here
Incorrect date/time causes certificate validity errors, but the error would be for the same domain, not a different one.
✗
The website's SSL certificate has expired
Why it's wrong here
An expired certificate would show an error for the correct domain, not a different domain.
✓
A malicious proxy or DNS hijacking is redirecting traffic to a fake site
Why this is correct
A man-in-the-middle attack can present a certificate for a different domain, indicating redirection to a fraudulent site.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The browser needs to be updated to the latest version
Why it's wrong here
Browser updates fix vulnerabilities but do not cause certificate domain mismatches.

Common exam traps

Common exam trap: answer the scenario, not the keyword

CompTIA often tests the distinction between certificate errors caused by date/time issues versus domain mismatches, and the trap here is that candidates may confuse a 'different domain' error with a simple expired certificate or browser update issue.

Trap categories for this question

Command / output trap
An expired certificate would show an error for the correct domain, not a different domain.

Detailed technical explanation

How to think about this question

When a proxy or DNS hijacking redirects traffic, the attacker's server presents its own SSL certificate, which is often self-signed or issued for a different domain. The browser's certificate validation checks the Common Name (CN) or Subject Alternative Name (SAN) against the requested domain; a mismatch triggers the 'different domain' error. In a real-world scenario, attackers may use tools like SSLstrip or ARP spoofing combined with a rogue certificate to intercept HTTPS traffic.

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 220-1202 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.

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FAQ

Questions learners often ask

What does this 220-1202 question test?

Browser and Application Security — This question tests Browser and Application Security — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: A malicious proxy or DNS hijacking is redirecting traffic to a fake site — The certificate error for a different domain indicates that the browser is being directed to a server whose SSL certificate does not match the expected banking site's domain. This is a classic sign of a man-in-the-middle attack, often caused by malicious proxy or DNS hijacking, where traffic is redirected to a fraudulent server presenting a certificate for a different domain.

What should I do if I get this 220-1202 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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