Cisco
352-001 · Question #286
352-001 Question #286: Real Exam Question with Answer & Explanation
The correct answer is A: Add an aggregation layer router in each geographical zone.. Adding a regional aggregation router in each geographical zone creates a hierarchical WAN topology that reduces hundreds of individual circuits to a small number of aggregated regional links, directly solving the manageability and scalability problem.
Question
Company A has grown nationwide in the U.S., and each new remote branch has a Metro Ethernet circuit provisioned back to the data center at the headquarters on the West Coast. The operations team says that it cannot manage hundreds of circuits as the company continues to grow. You review the topology and notice that many of the branches are close to each other in geographical zones. How can you redesign this network to improve manageability and increase scalability?
Options
- AAdd an aggregation layer router in each geographical zone.
- BAdd a redundant data center on the East Coast to serve some of the traffic there.
- CAdd a default route in each branch toward the data center on the West Coast.
- DUse Optimized Edge Routing at the data center.
- EBuild an overlay MPLS network with Layer 3 VPN.
Explanation
Adding a regional aggregation router in each geographical zone creates a hierarchical WAN topology that reduces hundreds of individual circuits to a small number of aggregated regional links, directly solving the manageability and scalability problem.
Common mistakes.
- B. Adding a second data center addresses geographic redundancy and availability, not the manageability of hundreds of individual branch circuits that the operations team must maintain.
- C. Configuring default routes is a routing table change, not a topology redesign, and does nothing to reduce the number of individually provisioned Metro Ethernet circuits.
- D. Optimized Edge Routing (OER/PfR) is a Cisco traffic engineering feature for intelligent path selection, not a topology restructuring tool that reduces circuit count or operational complexity.
- E. An MPLS Layer 3 VPN overlay adds significant cost and configuration complexity and does not aggregate branch circuits or eliminate the burden of managing hundreds of individual Metro Ethernet connections.
Concept tested. Hierarchical WAN aggregation layer design scalability
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