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单项选择题Your Customer has 21 users, each requiring both PC and IP Phone connectivity. Which is the correct configuration for this customer?()

A、1 Cisco 2811 ISR,1 Catalyst Express 500G-12TC,2 Catalyst Express 500-24PC

B、1 Cisco 2851 ISR, Catalyst Express 500G-12TC,3 catalyst Express 500-24PC

C、1 Cisco 2821 ISR,Catalyst Express 500G-12TC,2 Catalyst Express 500-24PC

D、1 Cisco 2801 ISR,1 Catalyst Express 500-24PC

  • D
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