Troubleshooting Cisco Unified Communications (CTCOLLAB, legacy) — Question 1

How does an IP Phone react upon initialization, if there is no CTL and ITL files present on the device?

Answer options

• A. The phone downloads only the files that are signed to that device.
• B. The phone blindly trusts the next series of downloaded files.
• C. The file matches the signature against the files on TFTP.
• D. The phone displays the message, Unprovisioned.

Correct answer: D

Explanation

When an IP Phone initializes without CTL and ITL files, it cannot validate the authenticity of the files it downloads, resulting in it displaying the message 'Unprovisioned'. The other options are incorrect because they imply that the phone can either trust files or validate them, which is not possible without the CTL and ITL files.