Cisco Certified Network Professional Practice Test 2025 – Your All-in-One Guide to Exam Success!

The command 'no lldp receive' effectively disables the reception of Link Layer Discovery Protocol (LLDP) messages on a specific interface. LLDP is a network protocol used for discovering devices on the local network. It allows devices such as switches, routers, and hosts to advertise their identity and capabilities to each other.

When used in the configuration of a network device, this command prevents that device from processing incoming LLDP packets. This can be important in network environments where LLDP traffic might be noisy or where it is necessary to restrict device discovery for security or management reasons.

In terms of the other options, enabling sending LLDP messages relates to commands that explicitly state LLDP sending needs to be enabled. Activating LLDP globally requires a different command to be invoked. Configuring the LLDP timer is also handled through a specific command that sets the interval for how often LLDP messages are sent and received. Each of these functions addresses different aspects of LLDP configuration and operation, but the 'no lldp receive' command specifically pertains to stopping the reception of these messages on that interface.