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NSE4 · Question #475

A new version of FortiOS firmware has just been released. When you upload new firmware, which is true?

The correct answer is A. If you upload the firmware image via the boot loader's menu from a TFTP server, it will not. The method used to upload new FortiOS firmware dictates whether the existing configuration will be preserved or if a clean installation will occur.

Submitted by lukas.cz· Apr 18, 2026FortiGate Deployment and System Configuration

Question

A new version of FortiOS firmware has just been released. When you upload new firmware, which is true?

Options

  • AIf you upload the firmware image via the boot loader's menu from a TFTP server, it will not
  • BNo settings are preserved. You must completely reconfigure.
  • CNo settings are preserved. After the upgrade, you must upload a configuration backup file.
  • DYou must use FortiConverter to convert a backup configuration file into the syntax required by

How the community answered

(68 responses)
  • A
    90% (61)
  • B
    1% (1)
  • C
    3% (2)
  • D
    6% (4)

Why each option

The method used to upload new FortiOS firmware dictates whether the existing configuration will be preserved or if a clean installation will occur.

AIf you upload the firmware image via the boot loader's menu from a TFTP server, it will notCorrect

Uploading firmware via the boot loader's menu from a TFTP server typically bypasses the configuration preservation mechanism, resulting in a clean install without retaining the previous settings.

BNo settings are preserved. You must completely reconfigure.

A standard firmware upgrade performed through the GUI or CLI typically preserves most settings; only specific methods like boot loader TFTP might not.

CNo settings are preserved. After the upgrade, you must upload a configuration backup file.

Most firmware upgrades do preserve settings, so stating 'no settings are preserved' is generally untrue for standard upgrade paths.

DYou must use FortiConverter to convert a backup configuration file into the syntax required by

FortiConverter is primarily for migrating configurations between different FortiGate models or major FortiOS versions with syntax changes, not for routine firmware upgrades on the same device.

Concept tested: FortiGate firmware upgrade methods and configuration preservation

Source: https://docs.fortinet.com/document/fortigate/7.4.0/administration-guide/200925/upgrading-downgrading-firmware

Topics

#Firmware upgrade#Bootloader recovery#TFTP#Configuration management

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