The version number, 11.20.x5.10, provides additional information about the contents of the disk image. This version number may correspond to a specific build of the Windows operating system or a particular software package.
The “disk-sm-windows-x64-jun-2015-version-11.20.x5.10” is a disk image specifically designed for 64-bit Windows operating systems. The “x64” designation indicates that the image is intended for use on computers with 64-bit processors, which are now the standard for most modern computers. disk-sm-windows-x64-jun-2015-version-11.20.x5.10
The June 2015 update refers to the release date of this disk image. This update likely includes security patches, bug fixes, and other improvements that were current as of June 2015. The version number, 11