300-425 Question 44
Select 3A retail organization has deployed a wireless network to support voice, video surveillance, and payment applications. The network administrator needs to ensure that voice traffic is given the highest priority, followed by video traffic, while maintaining efficient bandwidth allocation for payment application traffic. Which QoS configuration setting should the administrator use to achieve this goal?
- A
Mark voice traffic with DSCP value EF (Expedited Forwarding) and assign it to the Platinum QoS profile.
- B
Assign video surveillance traffic to the Gold QoS profile with a DSCP value of AF41 (Assured Forwarding).
- C
Configure payment application traffic with the Bronze QoS profile and a DSCP value of CS1 (Class Selector 1).
- D
Allocate the same QoS profile for all traffic types to simplify management and ensure fairness.
- E
Enable bandwidth limits for Gold and Bronze profiles to reserve more bandwidth for Platinum traffic.
Show answer and explanation
Correct answers: A, B, C
Explanation
To properly implement QoS on a wireless network, traffic types must be prioritized based on their sensitivity to latency and bandwidth requirements. Voice traffic requires the highest priority with DSCP EF and the Platinum QoS profile. Video traffic should have a high priority but slightly lower than voice, using the Gold QoS profile and DSCP AF41. Payment applications, which are less sensitive to latency, can use the Bronze QoS profile with DSCP CS1. By configuring traffic in this manner, the administrator ensures optimal QoS for all applications while meeting the organization's requirements.
- A. Correct.
Marking voice traffic with DSCP EF and assigning it to the Platinum QoS profile ensures the highest priority and low latency, which is critical for voice communication.
- B. Correct.
Assigning video surveillance traffic to the Gold QoS profile with a DSCP value of AF41 provides high priority for video traffic while ensuring efficient bandwidth usage.
- C. Correct.
Configuring payment application traffic with the Bronze QoS profile and a DSCP value of CS1 ensures lower priority compared to voice and video, which is appropriate for non-latency-sensitive applications.
- D. Incorrect.
Allocating the same QoS profile for all traffic types would not differentiate between traffic priorities, violating the organization's requirement for prioritization.
- E. Incorrect.
Enabling bandwidth limits for Gold and Bronze profiles is unnecessary in this scenario, as the DSCP and QoS profiles already handle prioritization and efficient bandwidth allocation.