The document discusses securing classified networks and sensitive data through the use of a Secure Network Access Platform (SNAP). SNAP allows users to securely access multiple isolated security domains from a single thin client desktop while preserving network isolation. It implements role-based access control, mandatory access controls, and label-based security to control access between security domains. SNAP leverages the security capabilities of the Solaris 10 operating system with Trusted Extensions to provide a certified, multi-level secure computing environment for government users.