Answer D is the technically correct selection. Badge readers on data-center doors are physical access control. They regulate who can enter protected spaces based on identity, role, and authorization. This aligns with Cisco CCNA 200-301 v1.1 because the exam blueprint requires engineers to recognize operational behaviour from configuration symptoms and topology requirements. RBAC can influence the policy, biometrics can be a factor, and MFA can strengthen authentication, but the control described is physical facility access. Treat the distractors carefully: most are real Cisco terms, but they solve a different problem or operate at a different layer. The selected answer is the one that would be used by an engineer on the device or in the design to produce the outcome stated in the question.
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit