NSE4 System and Network Administration Practice Question
An administrator needs to upgrade the firmware on a FortiGate from version 6.4.10 to 7.0.1. The device currently runs FortiOS 6.4.10. Which upgrade path should be followed?
⚠ Common exam trap
Test-takers frequently assume GUI or direct upgrades are always safe, but Fortinet strictly enforces sequential version upgrades to prevent configuration and system incompatibilities.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Upgrade to 7.0.0 first, then to 7.0.1
Fortinet requires a sequential upgrade path for major version jumps. FortiOS 6.4.10 can upgrade directly to 7.0.0, and then to 7.0.1, because 7.0.0 is the first release in the 7.0 branch. Upgrading directly from 6.4.10 to 7.0.1 is not supported as it skips the required intermediate version.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Downgrade to 6.2.0 then upgrade to 7.0.1
Why it's wrong here
Downgrading from 6.4.10 to 6.2.0 is not a supported upgrade path because it moves backward; FortiOS firmware downgrades often require a factory reset and can cause configuration loss. Furthermore, 6.2.0 is an older major branch that does not serve as a stepping stone to 7.0.1. The correct path is forward to 7.0.0 first, so this approach adds unnecessary risk and steps without any benefit.
- ✓
Upgrade to 7.0.0 first, then to 7.0.1
Why this is correct
FortiGate requires that you first upgrade to the initial release of the target major branch, in this case 7.0.0, before applying the latest patch 7.0.1. The 6.4.x branch and the 7.0.x branch use different configuration database schemas, and 7.0.0 is the only version that performs the required schema migration. Without this intermediate step, the upgrade to 7.0.1 would be rejected by the firmware validation process.
- ✗
Upgrade directly from 6.4.10 to 7.0.1 via the GUI
Why it's wrong here
Attempting to upgrade directly from 6.4.10 to 7.0.1 is blocked by FortiGate's upgrade path validation, which requires that you install the first release of the next major version before any later patch. The GUI checks the current firmware version against the firmware image's supported upgrade source list, and 7.0.1 only lists 7.0.0 as a valid predecessor. Bypassing this rule can cause the upgrade to fail or leave the configuration in an inconsistent state.
- ✗
Upgrade to 6.4.99 (if exists) then to 7.0.1
Why it's wrong here
Fortinet does not release a 6.4.99 build; the 6.4 branch's final patch is 6.4.10, so this version does not exist as an upgrade target. Even hypothetically, upgrading to a future 6.4.patch would not advance you to the 7.0.x branch; the official path remains 6.4.10 → 7.0.0 → 7.0.1. Adding a non-existent version only complicates the upgrade procedure without satisfying Fortinet's upgrade path requirements.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This NSE4 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE4 exam.