CND Practice Question: Incident Detection Response And Threat Prediction
A threat intelligence team is gathering data from open and closed sources. Which TWO options represent sources of open-source intelligence (OSINT) commonly used by network defenders? (Choose TWO)
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
✓
AlienVault Open Threat Exchange (OTX)
OSINT sources include publicly accessible threat feeds, vulnerability databases, and security blogs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AlienVault Open Threat Exchange (OTX)
Why this is correct
AlienVault OTX is an open, community-driven threat intelligence platform sharing public IOCs.
- ✗
Internal employee performance reviews
Why it's wrong here
Internal HR data is confidential internal data, not threat intelligence.
- ✗
Proprietary zero-day broker feeds requiring signed NDA and high subscription fees
Why it's wrong here
Exclusive paid broker feeds are classified as closed or proprietary intelligence, not OSINT.
- ✗
Classified military signals intelligence intercepts
Why it's wrong here
Classified signals intelligence is restricted government data, not open source.
- ✓
National Vulnerability Database (NVD)
Why this is correct
NVD is a publicly available repository of vulnerability data managed by NIST.
About these practice questions
This CND question is part of Courseiva's 323-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 EC-Council exam blueprint
This CND practice question is part of Courseiva's free EC-Council 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 CND exam.