Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, principally wired Ethernet. LLDP is used in network management to discover network topology, troubleshoot connectivity issues, and provide information for automated network documentation. It allows devices to advertise information such as device name, port description, system capabilities, and VLAN ID.
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