View the exhibit. A network administrator configures the HP 2610-24-PoE switch as shown in the exhibit. Computers belong to the data VLAN, which is VLAN 10. IP phones should transmit traffic on VLAN 20. They should be able to connect to any port and use LLDP-MED to obtain their VLAN assignment. However, IP phones connected to this switch cannot reach the VoIP server and are not functioning correctly. IP phones connected to other switches are functioning correctly. What must the network administrator do?
A. Make VLAN 20 untagged on the ports into which phones are connected.
B. Define VLAN 20 as a voice VLAN.
C. Enable LLDP-MED globally.
D. Enable LLDP-MED on the ports into which phones are connected.
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