Which of the following BEST limits the impact of server failures in a distributed environment?

A. Redundant pathways

B. Clustering

C. Dial backup lines

D. Standby power

Explanation:

Clustering allows two or more servers to work as a unit, so that when one of them fails, the other takes over. Choices A and C are intended to minimize the impact of channel communications failures, but not a server failure. Choice D provides an alternative power source in the event of an energy failure.