What does RU denote?

What does RU denote?

• A. Rack Unit
• B. Redundancy Unit
• C. Radius Unit
• D. Repair Unit

Answer: (A)

Rack height in equipment cabinets is described using rack units. RU denotes Rack Unit, the standard measure for how tall a piece of gear is when mounted in a 19-inch rack. A single rack unit, or 1U, equals 1.75 inches (44.45 mm). Equipment heights are given in multiples of U, like 1U, 2U, 4U, and so on, which keeps sizing consistent across different devices and vendors. The other terms listed aren’t standard abbreviations for this context, so they don’t describe how tall the equipment is in a rack.

Rack height in equipment cabinets is described using rack units. RU denotes Rack Unit, the standard measure for how tall a piece of gear is when mounted in a 19-inch rack. A single rack unit, or 1U, equals 1.75 inches (44.45 mm). Equipment heights are given in multiples of U, like 1U, 2U, 4U, and so on, which keeps sizing consistent across different devices and vendors. The other terms listed aren’t standard abbreviations for this context, so they don’t describe how tall the equipment is in a rack.