单项选择题
A network is composed of several VRFs. It is required that VRF users VRF_A and VRF_B be able to route to and from VRF_C，which hosts shared services. However，traffic must not be allowed to flow between VRF_A and VRF_B. How can this be accomplished？（）
A.route redistribution B.import and export using route descriptors C.import and export using route targets D.Cisco MPLS Traffic Engineering
单项选择题 WhichOSPFLSAtypedoesanASBRusetooriginateadefaultrouteintoanarea？（）
多项选择题 Whichtwooftheseparametersareusedtodetermineaforwardingequivalenceclass？（）
单项选择题 WhichoneofthesestatementsistrueofOSPFtype5LSAs？（）
