Storage Area Network
1. A Storage Area Network or SAN is a high speed specialized network that provides access to high performance and highly available storage sub-systems.
 {{#ev:youtube|mFZG7JYSvQA|350}} Related Terms: Cluster, Network Attached Storage.
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2. Storage Area Network or SAN is a high-speed, special purpose, dedicated network that supports communications between computers and storage servers in support of data-intensive applications such as inventory management, credit and billing management, receivables management, customer relationship management, and supply chain management.
A SAN is much more complex than simple network-attached storage (NAS) and provides application users with much faster access to databases, SANs also provide for centralized management of critical data, including accessibility, security, and backup.
Source: YourDictionary.com
2. In computing, a storage area network (SAN) is an architecture to attach remote computer storage devices (such as disk arrays, tape libraries and optical jukeboxes) to servers in such a way that, to the operating system, the devices appear as locally attached.
Source: Wikipedia