Final answer:
WAN optimization is the technology that reduces bandwidth burden on an IP WAN by caching frequently accessed content locally.
Step-by-step explanation:
The performance optimization technology that uses a network appliance to receive a copy of content stored elsewhere, such as a video presentation from a corporate server, and serves that content to local clients to reduce bandwidth usage on an IP WAN is known as WAN optimization. WAN optimization appliances work by caching frequently accessed content locally, so that it does not need to be repeatedly transferred over the Wide Area Network. This process can significantly reduce the amount of data that needs to travel over the WAN, speeding up access for local users and conserving bandwidth.