The Internet TCP port 2001 is commonly used by the Cisco SCCP (Skinny Client Control Protocol). This protocol is utilized by Cisco IP Telephony solutions, specifically for communication between Cisco CallManager and Cisco VOIP phones. Additionally, it is also used by the CAPTAN (Computer Automated Personal Test and Answer Network) testing system. However, it's important to note that usage of port 2001 can vary depending on the specific network configuration and software implementation.
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