Which of the following are ways to transport SAN traffic？（）

A. A collection of disks presented as storage to multiple servers through dedicated channels. 
B. A collection of disks presented as storage to a single server through an existing network.
C. A collection of disks presented as storage to a single server through directly attached technologies.
D. A collection of disks presented as storage to multiple servers through an existing network.

A. Number of drives X capacity of the smallest drive
B. （Number of drives 2） X capacity of the smallest drive 
C. Number of drives X capacity of the largest drive
D. （Number of drives 1） X capacity of the smallest drive

A. RAID 0
B. RAID 1
C. RAID 3
D. RAID 5