Implementing Cisco Video Network Devices (CIVND, legacy) — Question 21

While trying to register to Cisco UCM, a Cisco IP phone reports TFTP authorization failure. Which cause of this issue is true?

Answer options

• A. The phone has a cabling issue.
• B. A firewall in the network is blocking access.
• C. The TFTP address for the phone is not in the CTL file.
• D. DHCP option 150 has the incorrect TFTP IP address configured.

Correct answer: D

Explanation

The correct answer is D because if DHCP option 150 contains an incorrect TFTP IP address, the phone will not be able to locate the TFTP server for configuration files, leading to authorization failure. Options A, B, and C do not directly address the issue of TFTP authorization, as they pertain to physical connectivity or firewall settings rather than TFTP address configuration.