.PCAP

.PCAP file extension

This is the basic program to work with .PCAP extension

Wireshark

Wireshark Wireshark file

Wireshark is a network protocol analyzer that lets you see what’s happening on your network at a microscopic level. It features deep inspection of hundreds of protocols, live capture and offline analysis, and VoIP analysis. Live data can be read from Ethernet, IEEE 802.11, PPP/HDLC, ATM, Bluetooth, USB, Token Ring, Frame Relay, FDDI, and other sources... (more)

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

.PCAP extension is also supported by the following program:

Ethereal

Ethereal Ethereal file

Sniffer application used to monitor network traffic, filtering by protocol.