edge caching
n.— «It would result in companies that can afford to pay delivering their content quickly to users while other sites would flounder as traffic dries up. One of the ways this is achieved is through what is known as “edge caching” which is frequently accessed content, temporary stored on servers that are located close to end users.» —“Google denies plan to ditch net neutrality” Brand Republic Dec. 18, 2008. (source: Double-Tongued Dictionary)