单项选择题
One of your customer has six sites， three of which process a large amount of traffic among them.He plans to grow the number of sites in the future. Which is the most appropriate design topology？（）
A. full mesh B. peer-to-peer C. partial mesh D. hub and spoke
多项选择题 WhichthreeLANroutingprotocolswouldbeappropriateforasmallretailorganizationwithamulti-vendorLANinfrastructure？（）
多项选择题 WhichtwoofthesearecharacteristicsofanIPSdevice？（）
多项选择题 WhichthreeareusedinconfiguringCallManagerdialplans？（）
