- A
Route Origin Authorization (ROA)
ROA authorizes an AS to originate a prefix.
- B
BGPsec path validation
Why wrong: BGPsec is for path validation, not origin validation.
- C
Relying Party (cache server)
The cache server processes ROAs and provides VRP data.
- D
IS-IS routing protocol
Why wrong: IS-IS is not part of RPKI.
- E
RPKI-to-Router (RTR) protocol
RTR is used to distribute VRP from cache to routers.
Question 698 of 1,000
350-501 Security and Services Practice Question
This 350-501 practice question tests your understanding of security and services. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A service provider is implementing BGP security using RPKI. Which three components are required for RPKI-based BGP origin validation? (Choose three.)
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
✓
Route Origin Authorization (ROA)
RPKI requires: 1) ROA (Route Origin Authorization) created by the prefix holder; 2) Relying Party (cache server) that fetches and validates ROAs; 3) RTR protocol to download the VRP (Validated ROA Payload) to routers. BGPsec is a separate standard for path validation. IS-IS is not involved.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Route Origin Authorization (ROA)
Why this is correct
ROA authorizes an AS to originate a prefix.
Related concept
Authentication checks who the user is.
- ✗
BGPsec path validation
Why it's wrong here
BGPsec is for path validation, not origin validation.
- ✓
Relying Party (cache server)
Why this is correct
The cache server processes ROAs and provides VRP data.
Related concept
Authentication checks who the user is.
- ✗
IS-IS routing protocol
Why it's wrong here
IS-IS is not part of RPKI.
- ✓
RPKI-to-Router (RTR) protocol
Why this is correct
RTR is used to distribute VRP from cache to routers.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 350-501 questions on access control and AAA configuration.
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FAQ
Questions learners often ask
What does this 350-501 question test?
Security and Services — This question tests Security and Services — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Route Origin Authorization (ROA) — RPKI requires: 1) ROA (Route Origin Authorization) created by the prefix holder; 2) Relying Party (cache server) that fetches and validates ROAs; 3) RTR protocol to download the VRP (Validated ROA Payload) to routers. BGPsec is a separate standard for path validation. IS-IS is not involved.
What should I do if I get this 350-501 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 350-501 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jul 4, 2026
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