An organization finds that most of the outgoing traffic on the network is directed at several Internet
sites viewed by multiple computers simultaneously. Which of the following performance
optimization methods would BEST alleviate network traffic?

A.
Load balancing internal web servers

B.
Redundant network resources

C.
Implement fault tolerance on the WAN

D.
Implement caching engines

Explanation:
A cache server is a dedicated network server or service acting as a server that saves Web pages
or other Internet content locally. By placing previously requested information in temporary storage,
or cache, a cache server both speeds up access to data and reduces demand on an enterprise’s
bandwidth.