In Supermicro systems, an AOC (Add-On Card), such as a NIC or GPU card, is typically secured to a bracket for stability within the PCIe tray or chassis. Based on Supermicro’s hardware design for systems like the SYS-421GE-TNHR2-LCC (a DLC-capable server), the AOC card is fastened to a metal bracket via a screw located on the metal bar at the top of the bracket. This aligns with standard PCIe card installation practices, where the bracket interfaces with the chassis, and a single screw on the bar secures it. Option A references an “AOM card” (likely a typo for AOC), but the screw isn’t on the card itself. Option C is incorrect as the card doesn’t self-secure, and D is false since a screw is standard. Supermicro’s DLC solutions maintain traditional card mounting for compatibility, making B the correct location. References: Supermicro PCIe card installation guides, SYS-420 series documentation.

In Supermicro systems with 2 M.2 slots (e.g., SYS-421GE-TNHR2-LCC), the slots are typically interchangeable unless specified by BIOS or hardware configuration (rare in standard setups). Re-installing an M.2 drive to the same slot isn’t critical for functionality, as the system auto-detects it, per Supermicro manuals. False (B) aligns with DLC system flexibility, making it correct over A. References: Supermicro M.2 installation guides, DLC system storage configs.