Which command enables LLDP to send the port-description TLV on the switch?
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Correct answer: switch(config)#lldp port-description.
Why this is the answer
The correct command is switch(config)lldp port-description. This command is entered in global configuration mode (config) and enables the Link Layer Discovery Protocol (LLDP) to include the port-description Type-Length-Value (TLV) in its advertisements. The port-description TLV provides a textual description of the port, which can be useful for network documentation and troubleshooting. The other options are incorrect because they specify the wrong configuration mode: switch(config-if)lldp port-description is for interface configuration mode, but LLDP port-description TLV is enabled globally, not per interface. switchlldp port-description is in privileged EXEC mode, which is for viewing or executing commands, not for making configuration changes. switch(config-line)lldp port-description is for line configuration mode, which is used for configuring console, auxiliary, or VTY lines, and is unrelated to LLDP.
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