Par2 Files are common on the Usenet today.They are not that common on the Internet in general and I can’t think of a location where I encountered them except for the Usenet. Par2 Files can be used to repair broken archives. That is the basic explanation of course, the technical is a little bit more complicated. Lets use a example to make it clearer. Let us assume that you have downloaded a number of rar files (.rar, r01, r02 and so on) that can be unpacked to create the file test.avi which has a size of 700 Megabytes.