D-Link DSR-1000 - Chapter 3. Command Hierarchy in CLI; CLI Commands Can be Divided into 4 Categories; The Router Configuration Is Divided into 5 Branches

Unified Services Router CLI Reference Guide
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Chapter 3. Command Hierarchy in CLI
3.1 CLI commands can be divided into 4
categories:
 Global commands
 Show commands
 Utility commands
 Configuration commands
3.2 The router configuration is divided into 5
branches:
 Net: Network Settings
 Security: Security Settings
 System: Admin Settings
 Dot11: Wireless Settings
 Vpn: VPN Settings