SNA is Nortel's new endpoint security and policy compliance solution designed to inspect, assess, ensure compliance to policy, and remediate at the network endpoint source, prior to network access. This solution, leveraging Nortel's Layered Defense approach, delivers endpoint security by enabling only trusted, role-based access privileges premised on the security level of the device, user identity and session context. Nortel SNA enforces security policy compliance for the enterprise network by ensuring that the required security definitions like antivirus applications, software patches and other safeguards are in effect before any user is granted access. It offers the industry's most effective, scalable and cost-efficient endpoint security and policy-compliance solution across LAN, WLAN, WAN and VPN networks.