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LLDP — Link Layer Discovery Protocol

Advertises device and port information to directly connected neighbors.

Acronym study batch 7 · reviewed 2026-10-20

Why learn LLDP — Link Layer Discovery Protocol?

Advertises device and port information to directly connected neighbors.

Where it came from

LLDP is link-local discovery, not an IP routing protocol.

• Memory aid (a learning cue, not the expansion): Link-Layer neighbors Discover each other's Ports.

Build your understanding

Work through these exercises in order. Try the task before opening a reference.

1. Without looking, expand LLDP: Link Layer Discovery Protocol.
2. Recall this memory aid: Link-Layer neighbors Discover each other's Ports.
3. Explain the practical use: Advertises device and port information to directly connected neighbors.
4. Explain this distinction: LLDP is link-local discovery, not an IP routing protocol.
5. Identify LLDP in a device specification, architecture diagram, or system inventory.

Documentation and sources

• IEEE 802 LAN/MAN standards (www.ieee802.org)
• IETF Internet standards (www.rfc-editor.org)

Catalog source: technology-maxxing. This page reproduces the existing catalog’s learning material and source links.