Final answer:
To disable LLDP globally, enter configuration mode on a Cisco IOS device and issue the 'no lldp run' command. This stops LLDP packets on all interfaces.
Step-by-step explanation:
To disable LLDP (Link Layer Discovery Protocol) globally on a network device, you need to access the device's command-line interface and enter the specific command that corresponds to the operating system the device is running. While the command can vary depending on the make and model, for devices running Cisco IOS, you would generally enter configuration mode and then issue the no lldp run command. This command stops LLDP packets from being sent or received on all interfaces of the device, effectively disabling LLDP globally.