What is winpcap?

WinPcap is a packet capture library for Windows that allows applications to capture and transmit network packets at a low level. It provides a programming interface for developers to access network traffic in real-time, enabling functionalities such as network analysis, monitoring, and packet filtering. WinPcap is commonly used in network diagnostic tools and security applications, though it has largely been succeeded by Npcap, which offers improved features and compatibility.