Which memory stores the switch's OS that can be updated?

• A. RAM
• B. Flash memory
• C. ROM
• D. NVRAM

Answer: (B)

Non-volatile, updatable storage for the operating system is what allows a switch to be updated. Flash memory is designed for this role: it keeps data without power and can be rewritten to replace the OS image with a newer version. When the switch boots, it loads the OS from this flash storage into RAM to run. The OS itself runs in RAM while executing, but the persistent copy lives in flash so future updates are possible.

RAM holds temporary, volatile data while the OS is active and loses it when power is removed. ROM is typically fixed and read-only firmware, not updated through normal upgrade processes. NVRAM holds non-volatile configuration data, not the OS image.