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Which of the following is the MOST appropriate approach…

After reviewing its business processes, a large organization is deploying a new web application
based on a VoIP technology. Which of the following is the MOST appropriate approach for
implementing access control that will facilitate security management of the VoIP web application?

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A.
Fine-grained access control

B.
Role-based access control (RBAC)

C.
Access control lists

D.
Network/service access control

Explanation:
Authorization in this VoIP case can best be addressed by role-based access control (RBAC)
technology. RBAC is easy to manage and can enforce strong and efficient access controls in largescale web environments including VoIP implementation. Access control lists and fine-grained
access control on VoIP web applications do not scale to enterprisewide systems, because they are
primarily based on individual user identities and their specific technical privileges. Network/service
addresses VoIP availability but does not address application-level access or authorization.


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