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單項選擇題

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

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