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Which layer serves as the boundary between L2 and L3 links in a datacenter infrastructure?
A. Access Layer
B. Core Layer
C. Aggregation Layer
D. None of above
Correct Answer: C
Explanation/Reference:
Access layer is the lowest layer used for physical connectivity. Core layer connects core to aggregation layers using L3 links.
Aggregation layer serves as an L2 and L3 boundary as well as a connecting point for firewall, etc.
