220-1102 Question 570
Single answerAd blockersA user reports that a company training website loads, but the embedded lesson videos and navigation buttons do not appear in the browser. The site works correctly in another browser on the same PC. You confirm the internet connection is stable and there are no proxy or DNS issues. The affected browser has a recently installed ad-blocking extension. What is the BEST next step to restore access while maintaining security and minimizing unnecessary changes?
- A
Disable the ad blocker for all websites in the browser settings
- B
Add the training website to the ad blocker allowlist and test the page again
- C
Clear the browser cache and cookies, then reset all browser settings to default
- D
Uninstall the browser and reinstall the latest version
Show answer and explanation
Correct answer: B
Explanation
The best answer is to add the trusted training website to the ad blocker's allowlist and retest. In real-world support, technicians should isolate the most likely cause and apply the least disruptive fix first. Ad blockers commonly interfere with legitimate website components such as embedded video players, JavaScript-based menus, pop-ups used for authentication, and content delivery domains. Allowlisting a known business site is a standard approach because it restores required functionality without disabling protection everywhere.
This aligns with common browser-extension troubleshooting best practices: verify whether the issue is browser-specific, identify recently installed extensions, and selectively disable or allowlist as needed. Documentation from major browser vendors and extension developers generally supports managing site permissions or per-site exceptions rather than broadly removing security-related tools. From an A+ Core 2 perspective, this scenario tests practical troubleshooting of browser settings, extensions, and security tools while balancing usability and protection.
- A. Incorrect.
This is not the best next step because it removes protection across all sites, which is broader than necessary. A common misconception is that disabling the ad blocker entirely is the fastest fix, but best practice is to make the smallest effective change. If the issue is limited to one known, trusted site, global disablement unnecessarily increases exposure to ads, trackers, and potentially malicious content on other sites.
- B. Correct.
This is correct. Ad blockers can block scripts, frames, media players, and page elements that are required for legitimate site functionality. If the website is trusted and the problem is isolated to that site in one browser with an ad-blocking extension installed, allowlisting that specific site is the most targeted and least disruptive fix. This preserves protection on other websites while restoring access to required business content.
- C. Incorrect.
This is a plausible troubleshooting step for some browser issues, but it is not the best next step here. The scenario already points to the ad-blocking extension as the likely cause because the site works in another browser on the same computer. Clearing cache and cookies or resetting the browser is more disruptive and may remove saved settings without addressing the root cause. Candidates might choose this if they focus on generic browser troubleshooting instead of the extension-specific clue.
- D. Incorrect.
This is incorrect because reinstalling the browser is excessive for a site-specific rendering issue with a likely extension-related cause. It also causes unnecessary downtime and does not directly address the fact that the affected browser has an ad blocker that may be filtering required content. This option reflects the misconception that major reinstall steps should be used early instead of isolating the most probable cause first.