Which of the following statements regarding Network Attached Storage (NAS) is TRUE? (Choose al that apply)

A.
Network Attached Storage (NAS) is a high-speed subnetwork of shared storage devices.

B.
Network Attached Storage (NAS) uses common file-system protocols such as Network File System (NFS) and Common Internet File System (CIFS) and is better suited to provide cross-platform support for networks that have a mixture of different operating systems.

C.
Network Attached Storage (NAS) has special switch mechanisms which allow SAN devices to communicate with each other outside of standard network infrastructure.

D.
In Network Attached Storage (NAS) each storage device can be directly accessed through its IP address.

Explanation:
In a Network Attached Storage (NAS) systems, storage devices are directly connected to the network media and have their own IP addresses. These storage devices may be accessible by IP address. Network Attached Storage (NAS) also uses common file-system protocols such as Network File System (NFS) and Common Internet File System (CIFS) and is better suited to provide cross-platform support for networks that have a mixture of different operating systems.
Incorrect
Answers:
A: A Storage Area Network (SAN) is a high-speed subnetwork of shared storage devices.
With NAS, the storage devices are directly attached to the local area network.
C: A Storage Area Network (SAN) has special switch mechanisms which allow SAN devices to communicate with each other outside of standard network infrastructure and allows for the backup of all data on the SAN outside of standard network infrastructure.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 213-215.