In the large-scale WLAN three-layer network, which of the following statements about the description of the DHCP server is incorrect? (Multiple choice)

Question

Options

• AIn a large-scale WLAN network, the AP can obtain the IP address of the AC from the DHCP server
• BIn a large-scale WLAN network, the AP can obtain the IP address of the AC from the DHCP server
• CIn a large WLAN network, it is recommended to deploy an independent DHCP server
• DIn a large-scale WLAN network, it is generally recommended to use the AC as the DHCP server

• A
  79% (41)
• B
  8% (4)
• C
  13% (7)

Explanation

Note: Options A and B in this question appear to be identical due to a likely transcription error - this matters for interpreting why A is marked incorrect alongside D.

In large-scale WLAN three-layer architectures, using the AC (Access Controller) as the DHCP server (option D) is incorrect guidance because the AC is already burdened with managing AP associations, roaming, and traffic - adding DHCP server duties degrades its performance at scale. Option C is correct: an independent, dedicated DHCP server is the recommended deployment model precisely to offload this responsibility. Option B reflects a genuinely true behavior - APs can obtain the AC's IP address via DHCP Option 43, which is standard practice for AP-to-AC discovery, making it a correct (not incorrect) statement. Since A and B appear identical here, A is likely a duplicate of a true statement that doesn't belong among the incorrect ones, or the original question had a different choice A (possibly something like "the DHCP server must be co-located with the AC," which would be false).

Memory tip: In large-scale WLANs, think "separate concerns" - the AC controls wireless, a dedicated server handles DHCP. Any answer suggesting the AC should serve as DHCP is wrong at scale.

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