ITPEC IP April 2026 Question 45
ITPEC IP April 2026 — Question 45 of 100
DNS cache poisoning — forged name-to-address data redirects a correct domain name to an attacker's IP address.
DNS resolves domain names to IP addresses. If an attacker inserts a false record into a resolver's cache, users can type the genuine URL but receive the fake address until the poisoned record expires or is removed.
Answer (b)
Why not others: (a) floods a service to deny availability; (c) manipulates people rather than DNS records; (d) causes malware download from a visited site but does not explain the corrupted name resolution.
Key rule: Correct URL plus wrong destination caused by altered DNS mapping indicates DNS poisoning.
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