请作答71题。
NAC’s（Network Access Control） role is to restrict network access to only compliant endpoints and （71） users. However, NAC is not a complete LAN （72） solution; additional proactive and （73） security measures must be implemented. Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 10Gbps, ensuring a high level of security plus application availability and performance. Nevis integrates NAC as the first line of LAN security （74） . In addition to NAC, enterprises need to implement role-based network access control as well as critical proactive security measures — real-time, multilevel （75） inspection and microsecond threat containment.
