UEFI中的classes是什麼?
UEFI machines can have one of the following classes, which were used to help ease the transition to UEFI:

Class 0: Legacy BIOS
Class 1: UEFI with a CSM interface and no external UEFI interface. The only UEFI interfaces are internal to the firmware.
Class 2: UEFI with CSM and external UEFI interfaces, eg. UEFI Boot.
Class 3: UEFI without a CSM interface and with an external UEFI interface.
Class 3+: UEFI class 3 that has Secure Boot enabled.
Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: UEFI中的classes是什麼? ### Response: UEFI machines can have one of the following classes, which were used to help ease the transition to UEFI:

Class 0: Legacy BIOS
Class 1: UEFI with a CSM interface and no external UEFI interface. The only UEFI interfaces are internal to the firmware.
Class 2: UEFI with CSM and external UEFI interfaces, eg. UEFI Boot.
Class 3: UEFI without a CSM interface and with an external UEFI interface.
Class 3+: UEFI class 3 that has Secure Boot enabled. 