XYZ LTD is concerned about the security in the perimeter of the network. Which three Cisco products can you offer to XYZ LTD?（）
- A、Integrated Services Routers
- B、Firewall Appliances
- C、Cisco Unified CallManager
- D、Multilayer switch with enhanced image
- E、Cisco Unity
- F、VPN Concentrators
正确答案:A,B,F
答案解析:有
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