You see the output unknown the first time you in the command, but the next...

The question involves troubleshooting an issue where the command output is initially unknown, but subsequent executions show diagnostic information for an interface (1/1/X). The task is to identify appropriate diagnostic commands to troubleshoot the issue.

Analysis of Options:

Option A (diag interface transceiver al):Incorrect syntax; “al” is not a valid parameter.

Option B (diag interface 1/VX transceiver all):Incorrect syntax; “1/VX” is not a valid interface format.

Option C (diag cable-diagnostic 1/1/X):Correct. This command runs a cable diagnostic test (TDR) on interface 1/1/X to check for cable faults, such as opens or shorts.

Option D (diag cable 1/1/X):Incorrect; “diag cable” is not a valid AOS-CX command.

Option E (diag 1/1/X transceiver all):Correct. This command displays detailed transceiver information, including status, errors, and signal quality, useful for diagnosing interface issues.

Why C and E are Correct:The diag cable-diagnostic 1/1/X command is used to perform TDR tests to identify cable faults, which could cause connectivity issues. The diag 1/1/X transceiver all command provides detailed transceiver diagnostics, such as power levels, errors, or hardware issues, helping pinpoint problems with the interface or connected device. These commands align with AOS-CX troubleshooting workflows for physical layer issues.

Relevance to Certification Objectives:

Troubleshooting (10%):Involves using diagnostic commands to troubleshoot campus network issues.

Connectivity (9%):Includes identifying problem areas in device deployment, such as cabling or transceiver issues.