A server cluster looks like a:

A.
single server from the user’s point of view.

B.
dual server from the user’s point of view.

C.
triple server from the user’s point of view.

D.
quadruple server from the user’s point of view.

Explanation:
A server cluster is a group of independent servers, which are managed as a single system that provides higheravailability, easier manageability, and greater scalability.
The cluster looks like a single server from the user’s point of view. If any server in the cluster crashes,
processing continues transparently.
Incorrect Answers:
B: A server cluster looks like a single server, not a dual server from the user’s point of view.
C: A server cluster looks like a single server, not a triple server from the user’s point of view.
D: A server cluster looks like a single server, not a quadruple server from the user’s point of view.

Krutz, Ronald L. and Russell Dean Vines, The CISSP Prep Guide: Mastering the CISSP and ISSEP Exams,
2nd Edition, Wiley Publishing, Indianapolis, 2004, p. 145