多项选择题 Which two of these are correct regarding the recommended practice for distribution layer design based on the following configuration?（）

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?（）

单项选择题 You are the Cisco Network Designer in Cisco.com. Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual ring topology?（）

单项选择题 You are the network consultant from Cisco.com. Please point out which Layer 2 access designs does not support VLAN extensions?（）