WinPcap is the industry-standard tool for accessing connections between network layers (connectivity and selection of routes between two host systems), under the Windows operating system. With this tool, you can capture-transmit network packets, manipulating the protocol stack.
WinPcap has some really valuable additional tools like core level packet filters, an engine for generating network statistics and support for remote packet capture.
WinPcap uses a combination of libraries and controllers to easily access the low-level network layers.
WinPcap is an efficient, versatile program that has become the preferred filter engine and packet capture program for the most popular network applications available today, like protocol analysers, network monitors, network intrusion detection systems, sniffers, traffic generators, traffic analysers, etc.
WinPcap is an essential application. Without it, for instance, the best network management programs (NMAP) won’t work, like Windump, Ethereal, etc.