Understanding Network Attached Storage (NAS) is simple. Traditionally, NAS systems are a simple manageable device, which provide network-bound data to users, with as less effort in maintenance as possible.
Workspace computers (PC, Notebook, Tablet, Workstation) typically include their own mass storage (DOM, HDD, SSD). These devices are usually just available to the user and are considered as Direct Attached Storage (DAS).
For providing data to authorised users, by being network comprehensive, storage systems with network connection were developed. These systems are available at any workspace computer in shared networks and offer file based transfer protocols like SMB/CIFS or iSCSI and FCoE. In professional applications, the access rights (ACL) for registered users must be considered. Personal data and network group data, shall only be accessible to autorized users.