The is a proprietary Layer 2 protocol used by Cisco devices to share information with directly connected neighbors. While CDP is built into hardware like routers and switches, network engineers often need a CDP tool on their PCs to identify which switch port a laptop is plugged into or to map out network topology without manual cable tracing. Top Free Cisco CDP Tools for Download
Several free and open-source applications allow Windows, Linux, and macOS devices to "speak" CDP, enabling them to receive or send discovery packets. Cisco CDP Monitor 3.2 Download - apponic cisco cdp tool free download
