● 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．
（66）A．automated B．distinguished C．authenticated D．destructed
（67）A．crisis B．security C．favorable D．excellent
（68）A．constructive B．reductive C．reactive D．productive
（69）A．defense B．intrusion C．inbreak D．protection
（70）A．port B．connection C．threat D．insurance
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● Virtualization is an approach to IT that pools and shares__（71）__so that utilization is optimized and supplies automatically meet demand．Traditional IT environments are often silos, where both technology and human __（72）__。 are aligned around an application or business function．With a virtualized __（73）__，people, processes, and technology are focused on meeting service levels, __（74）__ is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible．We offer a broad spectrum of virtualization__（75）__that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources．
（71）A．advantages B．resources C．benefits D．precedents
（72）A．profits B．costs C．resources D．powers
（73）A．system B．infrastructure C．hardware D．link
（74）A．content B．position C．power D．capacity
（75）A．solutions B．networks C．interfaces D．connections
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