Compressed files are often referred to as archives; such as the well-known ZIP or RAR archives, the lesser known archives TAR and GZIP, or even comic book archive files like CBR. These archives can contain one or more files of different types. The information given for the Archived File Name gives an indication about the file or typically the first file contained in the compressed archive. Thus, it can and usually does differ from the name (including the extension) of the archive file itself.
For example, a file called testing.zip (which would be the file name and file type extension) could contain a file like examle.png (which represents the Archived File Name and file type extension).