Network-attached storage consists of hard disk storage, including multi-disk RAID systems, and software for configuring and mapping file locations to the network-attached device. Network-attached storage can be a step toward and included as part of a more sophisticated storage system known as a storage area network (SAN).NAS software can usually handle a number of network protocols, including Microsoft's Internetwork Packet Exchange and NetBEUI, Novell's Netware Internetwork Packet Exchange, and Sun Microsystems' Network File System. Configuration, including the setting of user access priorities, is usually possible using a Web browser.Network-attached storage (NAS) is now a major player in the externally connected storage market, moving from simple filer to storage networking protocol provider. More customers are using NAS as part of their core data storage infrastructure to deliver file services and support business critical applications. As a VAR or systems integrator, you should be taking advantage of NAS features like snapshots and replication to meet customers' growing business storage needs.