单选题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？（）Aroute redistributionBimport and export using route descriptorsCimport and export using route targetsDCisco MPLS Traffic Engineering
单选题
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
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