SK0-003 · Question #221
An administrator has a rack server that is 5.25 inches (13.3 cm) tall, which of the following is the correct U size for this server?
The correct answer is B. Three. Rack unit (U) sizing defines the vertical height of equipment in a 19-inch rack, with each U standardized at 1.75 inches (4.45 cm). To determine the correct U size, divide the server's height by this standard unit.
Question
An administrator has a rack server that is 5.25 inches (13.3 cm) tall, which of the following is the correct U size for this server?
Options
- AOne
- BThree
- CFour
- DFive
How the community answered
(30 responses)- A7% (2)
- B90% (27)
- D3% (1)
Why each option
Rack unit (U) sizing defines the vertical height of equipment in a 19-inch rack, with each U standardized at 1.75 inches (4.45 cm). To determine the correct U size, divide the server's height by this standard unit.
A 1U server is 1.75 inches tall, which is significantly shorter than the given server height.
A 3U server has a height of 3 multiplied by the standard 1.75 inches per U, which equals 5.25 inches. This calculation perfectly matches the given server height of 5.25 inches (13.3 cm), indicating it is a 3U server.
A 4U server is 7 inches tall, which is taller than the given server height.
A 5U server is 8.75 inches tall, which is much taller than the given server height.
Concept tested: Rack unit (U) server sizing
Source: https://en.wikipedia.org/wiki/Rack_unit
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