2.12.2 Web Caches

• Large organisations can improve web performance by sticking a web cache in front of HTTP connections
• The cache inspects an incoming HTTP request to see if it can satisfy the request from locally cached objects.
• If yes, then the object is returned, and the last reference time is updated
• If no, then the object is retrieved and copied locally if allowed.
• Web objects can be marked as non-cacheable.
• Caching is a major part of the HTTP standard