- A
Registration Authority (RA)
The RA assists the CA by verifying certificate requestors' identities.
- B
Symmetric encryption key
Why wrong: Symmetric keys are not part of PKI; PKI uses asymmetric keys.
- C
Digital certificate
Digital certificates are the core of PKI, linking identity to a public key.
- D
Hash function
Why wrong: Hash functions are used in cryptography but are not specific PKI components.
- E
Certificate Authority (CA)
The CA is the trusted entity that issues and manages digital certificates.
Question 312 of 1,000
200-201 Security Concepts Practice Question
This 200-201 practice question tests your understanding of security concepts. 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.
Which THREE components are part of a Public Key Infrastructure (PKI)? (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
✓
Registration Authority (RA)
The Registration Authority (RA) is a key component of a PKI because it acts as the intermediary between the user and the Certificate Authority (CA). The RA is responsible for verifying the identity of an entity requesting a digital certificate before the CA issues the certificate, thereby offloading identity proofing tasks from the CA.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Registration Authority (RA)
Why this is correct
The RA assists the CA by verifying certificate requestors' identities.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Symmetric encryption key
Why it's wrong here
Symmetric keys are not part of PKI; PKI uses asymmetric keys.
- ✓
Digital certificate
Why this is correct
Digital certificates are the core of PKI, linking identity to a public key.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Hash function
Why it's wrong here
Hash functions are used in cryptography but are not specific PKI components.
- ✓
Certificate Authority (CA)
Why this is correct
The CA is the trusted entity that issues and manages digital certificates.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between PKI components (CA, RA, digital certificate) and cryptographic primitives (hash functions, symmetric keys), so candidates mistakenly select hash functions or symmetric keys because they are associated with security, but they are not structural PKI components.
Detailed technical explanation
How to think about this question
In a PKI, the RA often implements the Certificate Policy (CP) and Certification Practice Statement (CPS) to validate subscriber identities, such as checking government-issued IDs or domain ownership via DNS challenges (RFC 4210). The RA does not sign certificates itself; it sends a verified request to the CA, which then issues the X.509 v3 certificate containing the public key, serial number, and validity period. In large enterprises, the RA can be a separate server or a role within a CA, and it may use protocols like CMP or SCEP to communicate with the CA.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 200-201 question test?
Security Concepts — This question tests Security Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Registration Authority (RA) — The Registration Authority (RA) is a key component of a PKI because it acts as the intermediary between the user and the Certificate Authority (CA). The RA is responsible for verifying the identity of an entity requesting a digital certificate before the CA issues the certificate, thereby offloading identity proofing tasks from the CA.
What should I do if I get this 200-201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This 200-201 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 200-201 exam.
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