Direct Attached Storage (DAS) - term used to describe a storage device that is directly attached to a host. Network Attached Storage (NAS) - is a data storage mechanism that uses special devices connected directly to the network media. Facilitates clients to access stored data through a server or in a direct way. Connection achieved using either a storage device interface such as Integrated Drive Electronics, or more commonly through the Small Computer Systems Interface (SCSI). Storage Attached Network (SAN) - is a discrete network of servers and storage devices (RAID, tapes) attached together through a high-speed interconnect like the Fibre Channel. SSD - Short for solid state disk , a high-performance plug-and-play storage device that is a lot faster than conventional rotating hard disks. Virtualization - Virtualization is a proven software technology that makes it possible to run multiple operating systems and multiple applications on the same computer at the same time. ILM - ILM o...