What is the minimum number of computers required for clustering?

A.
1

B.
2

C.
4

D.
8

Explanation:
A minimum of two computers are required for the implementation of clustering.
Incorrect Answers:
A, C: At least two computers are required for clustering.
D: Up to 8 computers can be supported in a server clustering system, but a minimum of two is required.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 41-44.