This chapter discusses the three most important preventive maintenance areas that every network administrator must know about. Performing regular backups and guarding against virus infections and other damaging programs are essential for protecting your data. Likewise, knowing when and if to apply software updates is essential for maintaining the health of a network and its applications. This chapter discusses the basic principles of these three network maintenance tasks and the tools involved in performing them.
This chapter requires some background knowledge about network operating systems, which is found in Chapter 4, "Networking Software."