Implementing Cisco Collaboration Cloud and Edge Infrastructure (CLCEI) — Question 15

What happens to the encrypted signaling traffic of a collaboration device if you place it inside a firewall with private IP addresses and try to make a call over IP without any collaboration infrastructure?

Answer options

• A. The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.
• B. Encrypted IP traffic for collaboration devices always is trusted by the firewall.
• C. The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.
• D. The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

Correct answer: C

Explanation

The correct answer is C because firewalls typically cannot inspect encrypted traffic, preventing the signaling from reaching the endpoint. Option A is incorrect as the firewall's application layer gateway feature does not apply to encrypted signaling. Option B is also wrong because not all encrypted traffic is automatically trusted by firewalls, and option D is misleading since the private address cannot be routed properly without collaboration infrastructure.