Which LLDP-MED capability enables voice VLANs to be automatically configured for VoIP phones?

Which LLDP-MED capability enables voice VLANs to be automatically configured for VoIP phones?

• A. Voice VLANs can be automatically configured for VoIP phones
• B. APs can request power as needed from PoE-enabled switch ports
• C. iSCSI client devices can request to have flow control enabled
• D. GVRP VLAN information can be used to dynamically add VLANs to a trunk

Answer: (A)

LLDP-MED uses the Network Policy capability to push and apply the required voice VLAN for a VoIP device. When a VoIP phone connects, the switch advertises a policy that includes the voice VLAN ID (and related QoS settings). The phone and switch apply that policy, placing the phone into the correct voice VLAN automatically, without manual port configuration. This automation is what enables voice VLANs to be configured for VoIP phones. Other options describe power delivery, flow control, or generic VLAN learning, which do not handle automatic voice VLAN assignment.

LLDP-MED uses the Network Policy capability to push and apply the required voice VLAN for a VoIP device. When a VoIP phone connects, the switch advertises a policy that includes the voice VLAN ID (and related QoS settings). The phone and switch apply that policy, placing the phone into the correct voice VLAN automatically, without manual port configuration. This automation is what enables voice VLANs to be configured for VoIP phones. Other options describe power delivery, flow control, or generic VLAN learning, which do not handle automatic voice VLAN assignment.