Implementing and Operating Cisco Collaboration Core Technologies (CLCOR) — Question 406

The security department will audit an IT department to ensure that the proper guidelines are being followed. The reports of the call detail records show unauthorized access to PSTN. Which two actions should an administrator check to prevent the unauthorized use of the telephony system? (Choose two.)

Answer options

• A. Forced authorization code is used to recognize a dialing extension and authorize an international call.
• B. Ensure that ad hoc conference calls are dropped if an external user is added.
• C. Call forward settings (All/Busy/No Answer) are restricted to internal extensions in the network.
• D. For extension mobility, logged-out CSS is restricted to internal extensions and emergencies.
• E. Add an additional firewall between the Cisco UCM server and the Expressway Core server.

Correct answer: C, D

Explanation

Options C and D are correct as they both restrict access to internal extensions, thus minimizing the risk of unauthorized usage. Option A does not directly address the security of the telephony system, while Option B focuses on conference calls, which may not impact overall system security. Option E is related to network security but does not specifically control telephony access.