Distributed File System (DFS) is a feature of Windows 2003 Server that allows you to created an abstracted name space for a file system (ie. mydomain.local) and then replicate the contents of that across multiple servers. When a client accesses the name space, they retrieve content from the closest server.
To allow IT to have a central location to access installation files and patches, while reducing WAN traffic, a DFS solution was proposed. The end result was those files being on the DFS, as well as install files and scripts for most of the group policies I developed.