单项选择题
Which technology is an example of the need for a designer to clearly define features and designedperformance when designing advanced WAN services with a service provider？（）
A. FHRP to remote branches. B. Layer 3 MPLS VPNs routing. C. Control protocols （for example Spanning Tree Protocol） for a Layer 3 MPLS service. D. Intrusion prevention， QoS， and stateful firewall support network wide.
多项选择题 WhichtwoofthesearecharacteristicsofMPLSVPNs？（）
单项选择题 Whichvirtualizationtechnologyallowsmultiplephysicaldevicestobecombinedintoasinglelogicaldevice？（）
多项选择题 WhendesigningtheIProutingfortheEnterpriseCampusnetwork，whichofthesefollowingtwoiBGBconsiderationsshouldbetakenintoaccount？（）
