Security Firewall

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Student/Faculty Message I/O
User Input or Display Output
Learning Resources, Messages, Personal Info,
Navigation Commands Mouse Events
Mouse Events Navigation Commands, Messages
Email
Catalyst I/O Forms/Tables
Applets (e.g., JChat)
Forum
Plug-Ins (MS, Adobe, etc.)
Content
Helper Applications
Catalyst User Interface/Web Browser
Content (Applet specific)
Web Server (Apache/IIS)
Security Firewall
WWW
Event Notification Services
Application Servlets (CGI programs/scripts)
Web Content or Remote Services
Content I/O
Repository Commands (Input only)
Catalyst Repository Server
Files
Queries, Schemas, Content-Results
SQL Database Management System
Network File Server
File Identifiers
Catalyst System Architecture