PCAP

PCAP (or libpcap) is a format used by networking tools such as TcpDump/WinDump to save captured network activity.

Format description

 * File format

Metaformat files

 * Synalysis grammar file (for Hexinator / Synalize It!; more details)
 * DFDL schema (see DFDL)

Sample files

 * Sample network captures

Other links

 * Wikipedia article
 * tcpdump official site