- A
The website has been blacklisted by the company's firewall.
Why wrong: A firewall block would prevent the site from loading at all, not cause a crash on one computer while working on another.
- B
A browser extension is incompatible with that website.
Extensions can cause conflicts with specific site code, leading to crashes. Testing with extensions disabled can confirm this.
- C
The user's network adapter driver is outdated.
Why wrong: An outdated network driver would affect all websites, not just one.
- D
The website is using a newer version of TLS that the browser doesn't support.
Why wrong: TLS mismatch would cause a connection error, not a browser crash.
Question 141 of 750
Why a Browser Extension May Cause Crashes on Specific Sites
This 220-1202 practice question tests your understanding of browser and application security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 crashes every time they visit a particular website. Other websites work fine. The technician tries the same website on another computer and it works normally. What is the most likely cause on the user's computer?
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.
Quick Answer
The answer is a browser extension incompatible with that specific website, as the crash occurs only on one site while others function normally and the same site works on a different computer. This points to a local software conflict rather than a network or server issue, because extensions can inject scripts or modify page content that triggers errors on certain sites. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your ability to isolate software-related problems versus hardware or connectivity faults, often appearing as a troubleshooting question where the trap is jumping to malware or driver updates. A common memory tip is “one site, one extension” — if only one website crashes, suspect a single add-on, not a system-wide problem.
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 browser extension is incompatible with that website.
Option B is correct because the issue is isolated to a single website on one computer, and the same website works on another computer. This rules out network-wide or server-side problems. Browser extensions can inject scripts, modify headers, or block resources that a specific website requires, causing crashes. Disabling extensions or testing in incognito mode (which typically disables extensions) can confirm this.
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 website has been blacklisted by the company's firewall.
Why it's wrong here
A firewall block would prevent the site from loading at all, not cause a crash on one computer while working on another.
- ✓
A browser extension is incompatible with that website.
Why this is correct
Extensions can cause conflicts with specific site code, leading to crashes. Testing with extensions disabled can confirm this.
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 user's network adapter driver is outdated.
Why it's wrong here
An outdated network driver would affect all websites, not just one.
- ✗
The website is using a newer version of TLS that the browser doesn't support.
Why it's wrong here
TLS mismatch would cause a connection error, not a browser crash.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the principle of isolation—candidates mistakenly attribute a single-site issue to network-wide or driver problems, but the key is that the problem follows the user's browser configuration, not the network or hardware.
Detailed technical explanation
How to think about this question
Browser extensions operate at the application layer, intercepting HTTP requests and responses via the WebExtensions API (e.g., chrome.webRequest). A poorly coded or incompatible extension might modify Content Security Policy headers or inject scripts that conflict with the website's JavaScript, leading to unhandled exceptions and a crash. Real-world scenarios include ad blockers that break single-page applications or password managers that inject fields incorrectly.
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.
- →
Browser and Application Security — study guide chapter
Learn the concepts, then practise the questions
- →
Browser and Application Security practice questions
Targeted practice on this topic area only
- →
All 220-1202 questions
750 questions across all exam domains
- →
CompTIA A+ Core 2 220-1202 study guide
Full concept coverage aligned to exam objectives
- →
220-1202 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 220-1202 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Windows OS Features and Tools practice questions
Practise 220-1202 questions linked to Windows OS Features and Tools.
Windows Settings and Control Panel practice questions
Practise 220-1202 questions linked to Windows Settings and Control Panel.
Windows Command-Line Tools practice questions
Practise 220-1202 questions linked to Windows Command-Line Tools.
Windows Administrative Tools practice questions
Practise 220-1202 questions linked to Windows Administrative Tools.
macOS Features and Tools practice questions
Practise 220-1202 questions linked to macOS Features and Tools.
Linux Commands and File Permissions practice questions
Practise 220-1202 questions linked to Linux Commands and File Permissions.
Mobile OS Features and Tools practice questions
Practise 220-1202 questions linked to Mobile OS Features and Tools.
Virtualization and Cloud Technologies practice questions
Practise 220-1202 questions linked to Virtualization and Cloud Technologies.
Physical Security Controls practice questions
Practise 220-1202 questions linked to Physical Security Controls.
Logical Security Concepts practice questions
Practise 220-1202 questions linked to Logical Security Concepts.
Wireless Security Protocols practice questions
Practise 220-1202 questions linked to Wireless Security Protocols.
Malware Types and Removal practice questions
Practise 220-1202 questions linked to Malware Types and Removal.
Practice this exam
Start a free 220-1202 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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 browser extension is incompatible with that website. — Option B is correct because the issue is isolated to a single website on one computer, and the same website works on another computer. This rules out network-wide or server-side problems. Browser extensions can inject scripts, modify headers, or block resources that a specific website requires, causing crashes. Disabling extensions or testing in incognito mode (which typically disables extensions) can confirm this.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 220-1202 practice questions
- During a Windows 10 deployment, you need to ensure that a specific Group Policy setting is applied to a computer before…
- After installing a new printer driver, a user's Windows 11 computer crashes with a blue screen error every time they try…
- A user reports that their Windows 10 computer is infected with a virus that keeps reinstalling itself after removal. Wha…
- A customer reports that their Windows 10 laptop is displaying pop-up ads even when no browser is open. They suspect a ma…
- A technician is configuring a new Windows 10 workstation for a user who handles sensitive financial data. The company po…
- A technician is responding to a security incident where an employee's credentials were used to access a server without a…
Last reviewed: Jul 4, 2026
This 220-1202 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1202 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.