How to deal with a large number of devices that do not match the version of AP and AC?

Question

Options

• AUpgrade the versions to match each other
• BReplace the AP device
• CReplace the switch
• DCheck whether the POE power supply is normal

• A
  73% (27)
• B
  3% (1)
• C
  8% (3)
• D
  16% (6)

Explanation

Upgrading the versions (A) is correct because version mismatches between Access Points (APs) and Access Controllers (ACs) are a software compatibility issue - the fix is aligning the firmware/software versions so the devices can communicate and function properly. This is the standard network maintenance approach when managing large-scale wireless deployments.

Why the distractors are wrong:

• B (Replace the AP): Replacing hardware is wasteful and unnecessary when the problem is purely a software version incompatibility - new APs would face the same mismatch without a version fix.
• C (Replace the switch): The switch is unrelated to AP-AC version compatibility; switches handle Layer 2 connectivity, not the management protocol between APs and their controller.
• D (Check PoE power): PoE issues would cause APs to not power on at all, not a version mismatch - this addresses a completely different failure mode.

Memory tip: Think "version mismatch = software problem = software fix." Any time the question mentions APs and ACs not communicating due to version differences, the answer is always upgrade, not replace hardware or check physical power.

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