Wireshark · Wireshark-users: Re: [Wireshark-users] pcap and cap difference

[Guy Harris <guy@xxxxxxxxxxxx>]

Danilo Vilela Dantas wrote:

> What is difference between pcap and cap files?

A "pcap file" is normally a capture file in libpcap format.

A "cap file" could be a file with the suffix ".cap", which could be any 
sort of file (nothing in any operating system enforces a particular file 
suffix being for a particular file format).  Most ".cap" files are 
probably capture files in various other formats, including Microsoft 
Network Monitor format, Windows Sniffer format, etc. - but some people 
might use ".cap" for libpcap-format capture files.