Samsung uses Odin for flashing firmware. If an official update is available, you'll use Odin to flash it.
Before downloading, let’s understand why 7.1.2 is the ideal choice for this tablet: download samsung tab 2 10.1 gt-p5100 android 7.1.2 firmware
Follow the specific instructions for your ROM and device to flash it using the required tool (like Odin for Samsung or Fastboot for AOSP/Google devices). Samsung uses Odin for flashing firmware