Cisco Discovery Protocol (CDP) is a proprietary Data Link Layer protocol developed by Cisco Systems in 1994 by Keith McCloghrie and Dino Farinacci. ... This multicast destination is also used in other Cisco protocols such as Virtual Local Area Network (VLAN) Trunking Protocol (VTP).

What protocol does CDP use?

CDP runs on all media that support Subnetwork Access Protocol (SNAP), including local-area network (LAN), Frame Relay, and Asynchronous Transfer Mode (ATM) physical media.

What is the purpose of CDP?

A customer data platform (CDP) is designed for marketing. It collects and unifies first-party customer data from multiple sources to build a single, coherent, complete view of each customer. It then makes that data available to marketers to create targeted and personalized marketing campaigns.