單項選擇題Which site-to-site VPN solution allows Cisco routers， PIX Firewalls， and Cisco hardware clients toact as remote VPN clients in order to receive predefined security policies and configuration parameters from the VPN headend at the central site？（）

A. Easy VPN
B. GRE tunneling
C. Virtual Tunnel Interfaces
D. Dynamic Multipoint VPN
E. Group Encrypted Transport VPN


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2.單項選擇題You are the Cisco Network Designer. Which of these is least important when determining howmany users a NAS can support？（）

A. bandwidth
B. number of plug-ins per scan
C. total number of network devices
D. number of checks in each posture assessment

3.單項選擇題Acme Nutrition manufactures a wide variety of vitamin supplements. It has a single manufacturing facility with 3 regional warehouses and 16 district sales offices. Currently the manufacturing facilityrequires 210 IP addresses； each warehouse requires 51 IP addresses； each district sales officerequires 11 IP addresses； and the IP WAN requires 38 IP addresses. if Acme Nutrition plans for20 percent growth in facilities， how many Class C subnets will the district sales offices require？（）

A. 19 （3 from the warehouse range and 16 from a separate Class C address）
B. 19 （3 from the warehouse block， 15 from a separate Class C block and 1 from the IP WAN block）
C. 20 （4 from the warehouse range，15 from a separate Class C block and 1 from the IP WAN block）
D. 16 （3 from the warehouse range and 13 from a separate Class C address）