350-801 Question #50: Real Exam Question with Answer & Explanation

Question

An administrator recently upgraded a Cisco Webex DX80 through its web interface but discovered the next morning that the unit had reverted to its previous version. What must the administrator do to prevent this from happening again?

Options

• AConfirm the phone load name in the phone configuration.
• BSet the prepare cluster for rollback to pre-8.0 enterprise parameter to true.
• CAssign a universal device template to the phone.
• DAssign a phone security profile with secure SIP.

Explanation

This question addresses a scenario where a Cisco Webex DX80 device reverts its firmware after an upgrade, and asks what action the administrator should take to prevent this.

Common mistakes.

• B. 'Prepare cluster for rollback to pre-8.0 enterprise parameter' is an enterprise parameter related to cluster upgrades and compatibility, not specific phone firmware reversion for a single device after a manual upgrade.
• C. Assigning a universal device template might affect device configuration but is not the direct solution to prevent a specific phone from reverting its firmware after a manual upgrade.
• D. Assigning a phone security profile with secure SIP is related to call signaling security, not firmware management or preventing a phone from reverting its firmware version.

Concept tested. Cisco CUCM device firmware management via Phone Load Name

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/11_5_1/configAdmin/cucm_b_configuration-guide-1151/cucm_b_configuration-guide-1151_chapter_01010.html

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