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220-1102 · Question #166

A user received the following error upon visiting a banking website: The security certificate presented by this website was issued for a different website's address. A technician should instruct the u

The correct answer is A. clear the browser cache and contact the bank.. This certificate mismatch warning can indicate a man-in-the-middle attack, DNS poisoning, or browser cache corruption serving stale certificate data. The safest first step is to clear the browser cache (which can resolve stale/cached certificate data) and then contact the bank to

Security

Question

A user received the following error upon visiting a banking website:

The security certificate presented by this website was issued for a different website's address. A technician should instruct the user to:

Options

  • Aclear the browser cache and contact the bank.
  • Bclose out of the site and contact the bank.
  • Ccontinue to the site and contact the bank.
  • Dupdate the browser and contact the bank.

How the community answered

(20 responses)
  • A
    75% (15)
  • B
    5% (1)
  • C
    15% (3)
  • D
    5% (1)

Explanation

This certificate mismatch warning can indicate a man-in-the-middle attack, DNS poisoning, or browser cache corruption serving stale certificate data. The safest first step is to clear the browser cache (which can resolve stale/cached certificate data) and then contact the bank to verify whether their site has a legitimate certificate issue. The user should NOT continue to the site (C) because doing so risks exposing credentials if an attack is occurring. Closing without clearing cache (B) doesn't address potential cache corruption, and updating the browser (D) won't fix a certificate mismatch. Clearing cache first is a safe, non-destructive diagnostic step.

Topics

#SSL/TLS certificates#Browser security warnings#Website troubleshooting#User security best practices

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