Quick Answer
The answer is preventive. Requiring a certificate for remote access authentication is a preventive security control because it enforces identity verification before any connection is established, directly blocking unauthorized devices from initiating a session and stopping data exchange before it can begin. On the Cisco CyberOps Associate 200-201 exam, this concept tests your ability to classify controls by their primary function—preventive controls stop threats before they occur, unlike detective controls that identify incidents after the fact. A common trap is confusing authentication requirements with detective or deterrent controls; remember that any control that verifies credentials or enforces a policy at the entry point is preventive. Memory tip: think of a bouncer checking IDs at the door—that’s preventive, not a camera watching the fight later.
This 200-201 practice question tests your understanding of security concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company's security policy requires that all remote access connections be authenticated using a certificate. Which type of control is this?
Corrective
Why wrong: Corrective controls remediate incidents.
Preventive
Preventive controls block unauthorized access, as does certificate authentication.
Detective
Why wrong: Detective controls discover attacks.
Deterrent
Why wrong: Deterrent controls discourage but do not prevent.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Preventive
Requiring a certificate for remote access authentication enforces a specific identity verification method before granting access. This is a preventive control because it stops unauthorized connections from being established by ensuring only devices with a valid certificate can initiate the session, directly blocking access before any data exchange occurs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Corrective
Why it's wrong here
Corrective controls remediate incidents.
Preventive
Why this is correct
Preventive controls block unauthorized access, as does certificate authentication.
Related concept
Read the scenario before looking for a memorised answer.
Detective
Why it's wrong here
Detective controls discover attacks.
Deterrent
Why it's wrong here
Deterrent controls discourage but do not prevent.
Common exam traps
Cisco often tests the distinction between preventive and deterrent controls, where candidates mistakenly choose deterrent because they think a certificate requirement 'discourages' attackers, but the correct classification is preventive because it technically enforces authentication and blocks access without it.
Detailed technical explanation
Certificate-based authentication relies on PKI, where the client presents a digital certificate signed by a trusted CA; the server validates the certificate chain and optionally checks CRL or OCSP for revocation. In protocols like EAP-TLS for VPNs or TLS mutual authentication for HTTPS, this prevents man-in-the-middle attacks because the client must prove possession of the private key corresponding to the certificate. A subtle behavior is that if the CA is compromised, all certificates issued by it become untrusted, potentially breaking the preventive control until the CA is re-established.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Security Concepts — This question tests Security Concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Preventive — Requiring a certificate for remote access authentication enforces a specific identity verification method before granting access. This is a preventive control because it stops unauthorized connections from being established by ensuring only devices with a valid certificate can initiate the session, directly blocking access before any data exchange occurs.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 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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