Cisco
200-155 · Question #33
Which layer serves as the boundary between L2 and L3 links in a datacenter infrastructure?
The correct answer is C. Aggregation Layer. 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.
Network Services
Question
Which layer serves as the boundary between L2 and L3 links in a datacenter infrastructure?
Options
- AAccess Layer
- BCore Layer
- CAggregation Layer
- DNone of above
How the community answered
(23 responses)- A4% (1)
- B4% (1)
- C91% (21)
Explanation
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.
Topics
#Data center network design#Aggregation layer#L2/L3 boundary
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