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LFCS · Question #379
LFCS Question #379: Real Exam Question with Answer & Explanation
The correct answer is A: Cache Poisoning. DNS servers are susceptible to attacks such as cache poisoning, Man-in-the-Middle (MITM) attacks, and Smurf attacks, which exploit various aspects of DNS operation or network protocols.
Submitted by olafpl· Apr 18, 2026Networking
Question
DNS servers are vulnerable to which of the following attacks? (Select THREE correct answers)
Options
- ACache Poisoning
- BFork Bomb Attack
- CPasswordBased Attack
- DManintheMiddle
- ESmurf Attack
Explanation
DNS servers are susceptible to attacks such as cache poisoning, Man-in-the-Middle (MITM) attacks, and Smurf attacks, which exploit various aspects of DNS operation or network protocols.
Common mistakes.
- B. A Fork Bomb attack aims to consume system resources by rapidly creating new processes, which is a general OS-level denial-of-service, not a vulnerability specific to the DNS protocol.
- C. Standard DNS queries and zone transfers do not involve password-based authentication for the general public, making 'password-based attack' not a common or direct vulnerability type against DNS servers.
Concept tested. DNS server attack types
Reference. https://www.cloudflare.com/learning/dns/dns-attacks/
Topics
#DNS Security#Network Attacks#Cache Poisoning#Man-in-the-Middle
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