300-430 Question 47
Select 4An enterprise network administrator is implementing QoS on a wireless network to ensure smooth performance for voice and video applications. The wired network is configured with four QoS levels: Platinum, Gold, Silver, and Bronze, which map to wireless QoS levels. Which of the following mappings would ensure proper prioritization of voice and video traffic in the wireless environment?
- A
Map Platinum QoS on wired to Voice Access Category (AC_VO) on wireless
- B
Map Gold QoS on wired to Video Access Category (AC_VI) on wireless
- C
Map Silver QoS on wired to Background Access Category (AC_BK) on wireless
- D
Map Bronze QoS on wired to Best Effort Access Category (AC_BE) on wireless
- E
Map Gold QoS on wired to Voice Access Category (AC_VO) on wireless
Show answer and explanation
Correct answers: A, B, C, D
Explanation
Proper wired-to-wireless QoS mapping is crucial to maintaining application performance in an enterprise wireless network. Voice traffic (Platinum) should map to AC_VO, video traffic (Gold) to AC_VI, background tasks (Silver) to AC_BK, and best-effort traffic (Bronze) to AC_BE. Incorrect mappings can result in poor prioritization, leading to degraded performance for critical applications.
- A. Correct.
Platinum QoS on wired corresponds to the highest priority for voice traffic. It should map to Voice Access Category (AC_VO) on wireless, ensuring minimal latency and jitter.
- B. Correct.
Gold QoS on wired is typically used for video traffic. Mapping it to Video Access Category (AC_VI) on wireless ensures proper prioritization and bandwidth allocation for video applications.
- C. Correct.
Silver QoS on wired is often mapped to lower-priority traffic such as background tasks. Mapping it to Background Access Category (AC_BK) on wireless appropriately deprioritizes this traffic.
- D. Correct.
Bronze QoS on wired corresponds to best-effort traffic. Mapping it to Best Effort Access Category (AC_BE) on wireless ensures it uses a normal priority level.
- E. Incorrect.
Mapping Gold QoS on wired to Voice Access Category (AC_VO) on wireless would incorrectly prioritize video traffic as voice, leading to suboptimal performance for both traffic types.