

The Link Layer Discovery Protocol (LLDP) is a vendor- neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity, capabilities, and neighbours on an IEEE 8. Link Layer Discovery Protocol - Wikipedia.

If mslldp.sys file is missing, you can try to restore it from your Windows. In general, the system files may come as part of the operating system. Please check if the mslldp.sys file exists in Windows folder under system disk or not. The Microsoft Link-Layer Discovery Protocol service is a kernel mode driver.
