Which statement describes the use of voice VLANs in Cisco IP telephony?
- The voice VLAN carries both tagged and untagged traffic.
- The voice VLAN carries untagged traffic having special QoS markings.
- The voice VLAN must be configured on the switch port to which the IP phone attaches.
- Data and voice frames are tagged with same VLAN ID between the IP phone and the switch when a voice VLAN is configured.
Exam with this question: CCNA Exploration 3: ESwitching Final Exam
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