The illustration identifies the ports and protocols for the communication between targets and proxy controllers, between proxy controllers and the Enterprise Controller, and between the Enterprise Controller and browsers. The Enterrpise uses Port 80 and HTTP to communicate with the Internet and browsers. It uses Port 443 to communicate with the Proxy Controllers. The Proxy Controllers use Port 21165 to communicate with all targets. In addtion, the proxy controllers use Ports 8002 and 8004 to communicate with target assets.