Cisco Sales Certification Exam 646-203

of options, which one is the only RAID level that uses disk mirroring?

A. RAID-0
B. RAID-5
C. RAID-3
D. RAID-1
Answer: D
Explanation: RAID 1 is the most common form of RAID at the moment and is often
used in disk mirroring and disk duplexing.646-203

Incorrect Answers:
A: RAID Level 0 (RAID 0) is the no-fault-tolerance process of using 64KB block storage
areas in a striped set.
B: RAID-5 is a fault-tolerant volume with data and parity striped intermittently across
three or more physical disks.642-432
C: RAID 3 is disk striping with parity, with data being moved at the bit level rather than
the block level.

Reference:
Leading the way in IT testing and certification tools, www.certifyme.com
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James G. Jones and Craig Landes, A+ Exam Cram 2 (2nd Edition), QUE Publishing,
Indianapolis, 2003, pp. 731 and 732.