.CAP file extension

Wireshark is the world's foremost network protocol analyzer. It lets you see what's happening on your network at a microscopic level. It is the de facto (and often de jure) standard across many industries and educational institutions. Decryption support for many protocols, including IPsec, ISAKMP, Kerberos, SNMPv3, SSL/TLS, WEP, and WPA/WPA2... (more)

The program works with the following extensions: cap, fdc, rf5, syc, tpc, erf, tr1, acp, trc, wpc, pkt, wpz, enc, 5vw, apc, atc, bfr, pcap, snoop and trace

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