It is a house shaped object with a roof on the top. At the base there are 2 rectangles like drawers that have a big black dot on the far left side. It looks like a combination of a house and a file cabinet.
This is a Root Server icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.