What are the benefits of Isilon Scale-Out NAS versus Scale-Up NAS technology?

What are the benefits of Isilon Scale-Out NAS versus Scale-Up NAS technology?
A . File-based storage, File system upper limit 20 PB+, quick scalability, and more granular file protection
B . Block-based storage, file system upper limit 10 PB, nodes contain all components, and RAID protection
C . Block-based storage, file system upper limit 20 PB+, nodes contain all components, and more granular file protection
D . File-based storage, file system upper limit 16 TB, quick scalability, and volume level RAID protection

View Answer

Answer: A