Implementing Cisco Collaboration Devices (CICD, legacy) — Question 97

An end user reports that when making B2B calls, the calls are connection; however, no audio or video is being received by either party. Local calls work fine.
Which two areas must be investigated? (Choose two.)

Answer options

• A. firewall configurations
• B. far end camera control
• C. VCS traversal zone
• D. endpoint traversal mode
• E. DNS configuration AD

Correct answer:

Explanation

The correct areas to investigate are A (firewall configurations) and C (VCS traversal zone) because firewalls can block media streams, preventing audio and video from being transmitted, while the VCS traversal zone is crucial for establishing connections between different networks. The other options, such as B (far end camera control) and D (endpoint traversal mode), are less likely to affect the call quality in this scenario, and E (DNS configuration AD) is not directly related to the media transmission issue.