200-150 · Question #161
Refer to the exhibit. Which description of this core-edge topology is true?
The correct answer is D. The hosts connect to an edge device, which is connect to the core.. In a core-edge topology, hosts connect to edge switches which in turn connect to the core layer, creating a two-tier hierarchical design where the edge and core are distinct layers.
Question
Refer to the exhibit. Which description of this core-edge topology is true?
Exhibit
Options
- AThe single-hop design provides minimal latency because the storage devices and the hosts
- BThe single-hop design from the host to the target provides a highly scalable solution.
- CA single core switch connects the storage devices and the hosts.
- DThe hosts connect to an edge device, which is connect to the core.
How the community answered
(15 responses)- C7% (1)
- D93% (14)
Why each option
In a core-edge topology, hosts connect to edge switches which in turn connect to the core layer, creating a two-tier hierarchical design where the edge and core are distinct layers.
A core-edge design is not single-hop from host to storage because traffic must traverse the edge-to-core link, introducing at least two switching hops between host and target.
Single-hop connectivity is not the mechanism that makes core-edge scalable; scalability comes from hierarchical aggregation at the core layer, not from minimizing hop count.
Core-edge topologies typically deploy multiple redundant core switches to eliminate single points of failure; describing a single core switch misrepresents both the redundancy requirements and the defining structural characteristic of the topology.
Core-edge topology places host servers at the edge layer, connected to edge switches that aggregate traffic and provide uplinks to the core switches where storage devices attach. This two-tier hierarchy creates at least a two-hop path from host to target, passing through both the edge device and the core. The description accurately reflects the standard definition of the core-edge SAN or data center fabric design.
Concept tested: Core-edge SAN topology structure and host connectivity
Source: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DC_3_0/DC-3_0_IPInfra.html
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