单选题Which statement about data center access layer design modes is correct?（）AThe access layer is the first oversubscription point in a data center design.BWhen using a Layer 2 loop-free design, VLANs are extended into the aggregation layer.CWhen using a Layer 2 looped design, VLANs are not extended into the aggregation layer.DWhen using a Layer 3 design,stateful services requiring Layer 2 connectivity are provisioned from the aggregation layer.EThe data center access layer provides the physical-level connections to the server resources and only operates at Layer 3.
单选题
Which statement about data center access layer design modes is correct?（）
A
The access layer is the first oversubscription point in a data center design.
B
When using a Layer 2 loop-free design, VLANs are extended into the aggregation layer.
C
When using a Layer 2 looped design, VLANs are not extended into the aggregation layer.
D
When using a Layer 3 design,stateful services requiring Layer 2 connectivity are provisioned from the aggregation layer.
E
The data center access layer provides the physical-level connections to the server resources and only operates at Layer 3.
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