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.
The data center access layer provides the physical-level connections to the server resources
and only operates at Layer 3.
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.
A
The data center access layer is the first oversubscription point in the data center because it aggregates the server traffic onto Gigabit EtherChannel, 10 Gigabit Ethernet, or 10 Gigabit EtherChannel uplinks to the aggregation layer
The data center access layer provides the physical-level attachment to the server resources and can operate in Layer 2 or Layer 3 mode.