[单选] The integrated services routing architecture provides the performance， availability， and reliabilityneeded to scale mission-critical business applications in the most demanding environments.Which statement best describes the benefits of Cisco Integrated Services Routers？（）

A . ISRs provide threat defense against attacks from hackers and viruses that can occur in thenetwork.
B . ISRs provide the framework to integrate and extend wired and wireless networks
C . ISRs provide concurrent security， voice， data， wireless， and application optimization services.
D . ISRS provide the common fabric， functionality， and CLI across the network.

佣金经纪人不属于任何会员行号，而仅以个人名义在交易厅取得席位，是我们通常所说的自由经纪人，这类经纪人在美国最为流行。成本总额随着报纸产销量的增加而呈正比例增加的成本是（）全部成本。单位成本。变动成本。固定成本。 The Cisco Smart Business Communications System offers support of third-party applications. When using TimeCard View， what device is used by employees to clock in and clock out？（） IP phone。 wireless access point。 secure router。 time clock。循环式索道中分为？主营收入含金量这项指标高，反映企业的产品适销对路，市场需求旺盛。 The integrated services routing architecture provides the performance， availability， and reliabilityneeded to scale mission-critical business applications in the most demanding environments.Which statement best describes the benefits of Cisco Integrated Services Routers？（）

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[单选] The integrated services routing architecture provides the performance， availability， and reliabilityneeded to scale mission-critical business applications in the most demanding environments.Which statement best describes the benefits of Cisco Integrated Services Routers？（）

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