D-PST-DY-23 · Question #50
When Dell S5248F-ON network switches are included with a PowerStore solution, what type of cables are used to connect the PowerStore nodes to the Dell data switches?
The correct answer is C. 25 GigE Twinax. Option C is correct because the Dell S5248F-ON is a 25GbE ToR (Top of Rack) switch whose 25G ports use SFP28 form-factor connectors, and Twinax (DAC - Direct Attach Copper) cables are the standard, cost-effective choice for short-distance server/storage-to-switch connectivity…
Question
Options
- A10 GigE Base-T
- B25 GigE Base-T
- C25 GigE Twinax
- D100 GigE Twinax
How the community answered
(62 responses)- B5% (3)
- C94% (58)
- D2% (1)
Explanation
Option C is correct because the Dell S5248F-ON is a 25GbE ToR (Top of Rack) switch whose 25G ports use SFP28 form-factor connectors, and Twinax (DAC - Direct Attach Copper) cables are the standard, cost-effective choice for short-distance server/storage-to-switch connectivity at that speed in PowerStore deployments.
Why the distractors are wrong:
- A (10 GigE Base-T): Wrong on two counts - wrong speed (10G, not 25G) and Base-T uses RJ45/twisted-pair cabling, not SFP28 ports.
- B (25 GigE Base-T): Correct speed, but Base-T (RJ45/twisted pair) is not the interface on the S5248F-ON's 25G ports; those are SFP28, which requires Twinax or fiber optics.
- D (100 GigE Twinax): Twinax is the right cable type, but 100GbE is the uplink/inter-switch speed - not the node-to-switch connection speed in this solution.
Memory tip: Think of the "F" in S5248F-ON as a clue - it signals fiber/SFP28 form-factor ports. SFP28 ports pair with Twinax DAC cables for 25G short-reach connections, making "25G + Twinax" the natural match for PowerStore node connectivity.
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