Because of the systems-level approach， Cisco security can defend against widespread attacks from hackers and viruses. What describes the Cisco network security strategy？（）

A. Cisco 830 Series routers
B. Cisco 850 Series routers
C. Cisco 1700 Series Modular Access Routers
D. Cisco 3800 Series Integrated Services Routers

A. finding out what a customer requires from a proposed solution
B. analyzes the customer’s business requirements and recommends the appropriate Cisco technologies to meet business requirements
C. finding out what end-user training a customer requires
D. finding out a customer’s physical requirements