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A. distributed routing
B. Cisco Unity Express
C. security， firewall and VPN
D. analog devices

A. A Cisco Integrated Security Solution uses the Cisco UN to form a layered and integratednetwork of protection that enables the enforcement of security policies throughout theinfrastructure.
B. A Cisco Integrated Security Solution provides software tools that allow customers to centrallymanage their network security policies.
C. in contrast to point products， the Cisco SDN is a system of defense that leverages the ubiquitous sensing and control capabilities of the network. Each part communicates with the otherto strengthen protection across the entire infrastructure.
D. A Cisco Integrated Security Solution enables barriers that serve as both physical and virtualprotection against possible threats. Security barriers include firewalls， authentication products，access control products， and tunneling and encryption techniques.