350-501 Security and Services Practice Question
A service provider wants to prevent BGP hijacking of its customer prefixes. The SP implements RPKI with BGP Origin Validation. When a route is received with an origin AS that does not match any ROA, what is the validation state?
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
✓
Not-found
In RPKI, if no ROA exists for the prefix, the state is 'not-found'. If the origin AS matches a ROA, it's 'valid'; if it conflicts, it's 'invalid'.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Invalid
Why it's wrong here
Invalid occurs when a ROA exists but the origin AS does not match.
- ✗
Valid
Why it's wrong here
Valid requires a matching ROA.
- ✗
Unknown
Why it's wrong here
Unknown is not a standard RPKI state.
- ✓
Not-found
Why this is correct
Not-found means no ROA is present for that prefix.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco 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 350-501 exam.