Exam 300-430 topic 1 question 20 discussion

To distinguish IP voice traffic from client data traffic and apply the appropriate QoS, the Voice VLAN feature must be enabled on the switch. Here’s why: Voice VLAN: This feature allows the switch to separate voice traffic (from devices like IP phones) from data traffic (from connected wireless clients). By assigning the IP phone to a dedicated Voice VLAN, the switch can prioritize voice traffic using QoS policies, ensuring high-quality voice communication. How it works: The IP phone is connected to the switch, and wireless clients may connect through the phone. The switch tags voice traffic with the Voice VLAN ID and applies QoS policies to prioritize it, while data traffic is handled separately.

A Voice VLAN is specifically designed to separate voice traffic from data traffic on the network. By configuring a Voice VLAN, the switch can prioritize IP voice traffic (e.g., from the 8865 IP phones) and apply the appropriate QoS settings to ensure high-quality voice communication.

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