NAS is technology that converts distributed, independent data to large, centralized one. It is used by different host computers and servers. Literally, it means it can connect to network and with setting for saving. So it is named as “Network Attached Storage”. NAS can support multiple protocols (eg, CIFS, FTP, HTTP, etc.), and it can also support a variety of operating systems. Via any work station, you can get access to NAS by IE or Netscape.