多项选择题
A. use a Layer 2 link between distribution switches
B. use a Layer 3 link between distribution switches
C. use a redundant link to the core
D. use a Layer 3 link between distribution switches with route summarization
单项选择题 What type of Call Admission control in CallManager allows for limits to the bandwidth consumed by active calls?（）
单项选择题 Which one is not the feature of the Cisco Unified Wireless Network architecture?（）
多项选择题 What two choices can you make when redundancy is required from a branch office to a regional office?（）
