Advanced Security Activation is designed to enable policy-based security mechanisms integrated within Fabric Operating System V2.6, V3.1, and V4.1. To enable advanced security capabilities, all switches within the IBM SAN Switches Fabric must be configured with their respective Fabric operating system version (2.6, 3.1, and 4.1) before activating the Advanced Security feature license key. When activated across the IBM SAN Switch Fabric, the Advanced Security Activation feature supports the following security capabilities: Centralized security management (trusted switches); Fabric-wide security policies to control access; Port-level access control; Switch-level access control; Management access controls (Telnet, SNMP, HTTP, API); Encryption of management data such as passwords; Strong and non-reputable authentication between switches.