A financial company is in the process of upgrading network access across the entire company.

In the architecture of a modern secure infrastructure, achievingleast privilegeis a foundational requirement, especially for a financial institution where data sensitivity is high.Role-Based Access Control (RBAC)is the specific methodology used to restrict network access based on the roles of individual users within an enterprise. By implementing RBAC, the security team can ensure that employees only have access to the specific network segments and resources necessary for their job functions, effectively minimizing the internal attack surface.

Within the Cisco Security ecosystem, RBAC is often operationalized through tools likeCisco Identity Services Engine (ISE)usingScalable Group Tags (SGTs). Instead of relying on static IP addresses or complex Access Control Lists (ACLs) that are difficult to maintain across different segments, RBAC allows for dynamic policy enforcement. For example, a "Financial Auditor" role would automatically be granted access to the accounting segment but blocked from the development segment, regardless of where they plug into the network. WhilePKI(Option C) provides strong authentication and encryption, andNetFlow(Option A) provides visibility, neither inherently defines the "least privilege" permission structure. RBAC is the architectural approach that directly maps business requirements to technical access policies, ensuring that security is maintained across segmented environments as required by the Cisco SDSI objectives for secure infrastructure design.

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