Phase 1
Figure 14 shows a small commercial Web site designed to provide efficient catalog browsing. All client requests pass through the firewall to a Dispatcher that routes the requests to a cluster of proxy servers with active caches that act as surrogate servers to the Web servers. Metric servers are colocated with the proxy servers to provide load-balancing data to the Dispatcher. This arrangement reduces the network load on the Web servers and isolates them from direct contact with the Internet.