ISC Infrastructure And System Security Practice Question
You are implementing DNS Security (DNSSEC). What is the primary benefit of this implementation?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It verifies the integrity and origin of DNS responses.
DNSSEC provides cryptographic authentication of DNS data, preventing DNS spoofing and cache poisoning attacks by verifying that records have not been modified.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It verifies the integrity and origin of DNS responses.
Why this is correct
This is the core purpose of DNSSEC signing.
- ✗
It hides DNS queries from ISP monitoring.
Why it's wrong here
DNSSEC is not an encryption mechanism for traffic confidentiality.
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It prevents DDoS attacks against DNS servers.
Why it's wrong here
DNSSEC actually makes DNS servers more vulnerable to amplification DDoS attacks.
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It increases the speed of DNS resolution.
Why it's wrong here
DNSSEC adds overhead and can increase latency.
Visual reference
About these practice questions
This ISC question is part of Courseiva's 208-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ISC exam.