Cisco Exam 400-007 Topic 6 Question 31 Discussion

Actual exam question for Cisco's 400-007 exam

Question #: 31
Topic #: 6

Company XYZ, a global content provider, owns data centers on different continents. Their data center design involves a standard three-layer design with a Layer 3-only core. HSRP is used as the FHRP. They require VLAN extension across access switches in all data centers, and they plan to purchase a Layer 2 interconnection between two of their data centers in Europe. In the absence of other business or technical constraints, which termination point is optimal for the Layer 2 interconnection?

Aat the core layer, to otter the possibility to isolate STP domains

Bat me aggregation layer because it is the Layer 2 to Layer 3 demarcation point

Cat the access layer because the STP root bridge does not need to align with the HSRP active node.

Dat the core layer because all external connections must terminate there for security reasons

Show Suggested Answer

Suggested Answer: B

by Arminda at Dec 23, 2023, 06:30 AM

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Dominga

6 months ago

Haha, yeah, you guys are on the right track. Can you imagine if they put the Layer 2 interconnection at the core? That would be like trying to drive a car through the engine block - not exactly the most efficient solution!

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Rikki

6 months ago

I agree, Osvaldo. Based on that, it seems like the optimal termination point for the Layer 2 interconnection would be at the aggregation layer, since that's the Layer 2 to Layer 3 demarcation point. That way, the STP domains can be isolated, and the VRRP active node doesn't need to align with the STP root bridge.

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6 months ago

Hmm, this question seems a bit tricky. I'm not sure if I fully understand the concept of VLAN extension across data centers and how that impacts the Layer 2 interconnection point.

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