8.11 Maintaining and Supporting the Network 
8.11.3 The need for periodic application of software patches and other fixes to the network
It is important to patch the software running on the client workstation and the server itself. There are always existing software on the client that will not be on the server and vice versa; if software is upgraded or patched on a server and not on a workstation, problems may occur when users try to access the software with a different version.