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多项选择题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

  • A,B,D
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