多选题When you design QoS on CE for an MPLS Layer 2 VPN， which three things should be considered？（）ALayer 2 access link QoS designBenterprise-to-service-provider mapping modelsCLayer 3 link access QoS designDservice provider service level agreementsELayer 2 link access load balancing
多选题
When you design QoS on CE for an MPLS Layer 2 VPN， which three things should be considered？（）
A
Layer 2 access link QoS design
B
enterprise-to-service-provider mapping models
C
Layer 3 link access QoS design
D
service provider service level agreements
E
Layer 2 link access load balancing
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