300-320 · Question #260
Which statement about the ToR design model is true?
The correct answer is A. It can shorten cable runs and simplify rack connectivity. In the Top-of-Rack (ToR) design model, a switch is placed at the top of each server rack. Servers within the rack connect directly to this local ToR switch using short, in-rack cables rather than running long cables across the data center floor to a centralized end-of-row (EoR)…
Question
Which statement about the ToR design model is true?
Options
- AIt can shorten cable runs and simplify rack connectivity.
- BEach ToR switch must be individually managed.
- CMultiple ToR switches can be interconnected to provide a loop-free spanning-tree infrastructure.
- DIt can connect servers that are located in separate racks.
How the community answered
(30 responses)- A93% (28)
- C3% (1)
- D3% (1)
Explanation
In the Top-of-Rack (ToR) design model, a switch is placed at the top of each server rack. Servers within the rack connect directly to this local ToR switch using short, in-rack cables rather than running long cables across the data center floor to a centralized end-of-row (EoR) or middle-of-row (MoR) switch. This significantly shortens cable runs and simplifies the physical connectivity within each rack. Option B is incorrect - ToR switches can be managed collectively through automation, SDN, or virtual chassis technologies. Option C is incorrect - interconnecting multiple ToR switches does not inherently create a loop-free STP infrastructure; in fact, it introduces the need for careful STP or routing design. Option D is incorrect - ToR switches are designed to serve servers within their own rack; servers in separate racks connect to their own ToR switches, not a shared ToR.
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