You work as a network technician at Company. Your boss， Mrs.， is interested in the Cisco Compatible Extensions program. What are three features of this program？ （）
- A、 Accounting
- B、 Analog and digital voice
- C、 Mobility
- D、 Security
- E、 Routing and switching
- F、 VLAN and QoS
正确答案:C,D,F
答案解析:有
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