Figure 8.   Typical multi-site (WAN) architecture

In the example, the company added a remote host to a LAN at another site (site 2). The sites 1 and 2 connect to each other using a private data line that is leased from a phone company, thereby creating an enterprise-wide WAN. The Access point VPN gateway ensures that the systems are not directly exposed to the internet. The network is configured for remote connectivity over internet.

The framework proxy points update the live graphic presentations on the Supervisor. The network site administrator decided to move the Supervisor onto the enterprise LAN at the site 1, since there is more data traffic generated internally than the occasional external browser (Browser A) use. The internal IP address of the Supervisor changed to one in the IP range of the new network to which it is attached, but the external address (because of the firewall) did not change.