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OCR: External Business Intor nat Database Suryor's Firewall: Surver's Server Server Figure 1 - A single web server provides the user interface for inter- nal users while on the Internet side of the firewall, where load is less predictable, there is a cluster of web servers than can scale to 32 machines. This allows the meeting of any demands as well as pro- viding total resilience for the service. All of the web servers access a central group of business component servers that sit behind the firewall, and a SQL Server database provides data persistence