NAC’s（Network Access Control）role is to restrict network access to only compliant endpoints and （66） users．However, NAC is not a complete LAN（67）solution;additional proactive and（68）security measures must be implemented．Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 100Gbps, ensuring a high level of security plus application availability and performance．Nevis integrates NAC as the first line of LAN security （69）In addition to NAC，enterprises need to implement role-based network access control as well as critical proactive security measures-real-time,multilevel （70）inspection and microsecond threat containment．

68（）

A．constructive

B．reductive

C．reactive

D．productive