CompTIA Tech+ (FC0-U71)Applications and SoftwareHard
A user is experiencing issues with their web browser, where some websites load correctly but others display 'Secure Connection Failed' errors or do not load at all, especially banking and shopping sites. The system clock on the computer is significantly out of sync with the actual time. What is the MOST likely cause of these browser issues?
- ACorrupted browser cache
- BIncorrect system date and time
- CDNS resolution problems
- DOutdated browser version
Show answer & explanationAnswer & explanation
Correct answer: B. Incorrect system date and time
Secure websites (HTTPS) rely on digital certificates, which have validity periods. If the system's date and time are incorrect, the browser may incorrectly perceive these certificates as expired or not yet valid, leading to 'Secure Connection Failed' errors.
Why the other options are wrong
- A. A corrupted cache can cause loading issues but typically not specific 'Secure Connection Failed' errors related to time.
- C. DNS problems would prevent all sites from loading or lead to 'site not found' errors, not specifically secure connection failures.
- D. An outdated browser might have compatibility issues, but a drastically incorrect system clock is a direct cause of certificate errors.
SSL/TLS Certificate Validation
The process by which a web browser verifies the authenticity and validity of a website's digital certificate, crucial for establishing secure (HTTPS) connections.
- Relies on correct system date and time.
- Verifies certificate expiration dates.
- Failure leads to 'Secure Connection Failed' or similar errors.
- Ensures communication with the legitimate server.
Memory trick: Time's ticking! An incorrect clock makes secure sites think their certificates are rotten.