To prevent non-critical services from occupying too much network resources, QoS policies can be configured in application protocols, namely smart application control SAC. Which of the following…

Question

Options

• ASAC mainly detects and identifies the 4th to 7th layer content and some dynamic protocols (such
• BFor the identified application protocol packets, their priority can be modified or directly discarded
• CIn roaming scenarios, the SAC policy of the user after roaming is based on the policy issued by
• DWhen a CAPWAP tunnel is established between WAC and AP to centrally forward user

• A
  13% (2)
• B
  7% (1)
• C
  73% (11)
• D
  7% (1)

Explanation

Option C describes SAC roaming policy behavior incorrectly. In roaming scenarios, the SAC policy applied to a user after roaming is not based on the policy issued by the roamed-to (target) controller or location - it is based on the policy from the home/original WAC (Wireless Access Controller) that initially served the user. The policy follows the user's session context, not the destination network element's configuration.

Options A, B, and D describe accurate SAC behaviors: A is correct because SAC operates at OSI layers 4–7 and handles dynamic protocol identification; B is correct because SAC can both remark packet priority and drop packets for identified application flows; D is correct in that SAC functions apply within CAPWAP tunnel-based centralized forwarding scenarios between WAC and APs.

Memory tip: Think of SAC roaming policy like a hotel guest's VIP status - the privileges (policy) are set by the home account (original WAC), not by whichever branch (AP/new controller) the guest walks into. When option C implies the destination sets the rules, that's the red flag.

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