Failover can be provided by ______. (Choose all that apply)
A.
clustering
B.
fault tolerance
C.
scaling up
D.
scaling out
Explanation:
Failover is the process in which a secondary system assumes the duties of a primary system should the primary system fail. If one server in a cluster fails, another server within that cluster will take over the load. Scaling out is the process of adding additional servers and implementing load balancing between them.
Incorrect Answers:
B: Fault tolerance describes a system’s ability to function even in the event of a hardware or software failure.
C: Scaling up provides improved server performance but does not provide high availability.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 40-54.