N10-009 Network Operations Practice Question
A network administrator scheduled a change window to upgrade the firmware on a core switch. During the upgrade, the switch fails to boot properly. The administrator needs to restore the switch to its previous operational state. Which of the following should the administrator have done before the upgrade to facilitate a successful rollback?
⚠ Common exam trap
Watch out — candidates often confuse 'backing up the configuration' with 'backing up the firmware image,' assuming a configuration backup alone is sufficient for a full rollback, but without the firmware image the switch may have no bootable OS to load.
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
✓
Backed up the current configuration and firmware image.
Backing up both the current configuration and the firmware image ensures that the administrator can restore the switch to its exact previous operational state if the upgrade fails. Without a backup of the firmware image, the switch may not have a valid bootable image to revert to, even if the configuration is saved. This is a fundamental prerequisite for any firmware upgrade rollback plan.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Notified all users of the maintenance window.
Why it's wrong here
Notifying all users of the maintenance window is an essential administrative and communication practice to manage expectations and inform stakeholders about potential service interruptions. However, this action does not provide any technical mechanism to restore the switch's functionality or configuration if the upgrade process fails. While crucial for user satisfaction and operational transparency, it offers no safeguard against technical issues that might arise during the firmware or configuration update.
When this WOULD be correct
A question asks: 'A network administrator is planning a firmware upgrade on a core switch. Which step should be taken to minimize user impact?' In that context, notifying users of the maintenance window would be correct to set expectations and reduce disruption.
- ✓
Backed up the current configuration and firmware image.
Why this is correct
Backing up the current configuration and firmware image is the most critical preparatory step for any network device upgrade. This action creates a complete snapshot of the device's operational state, including all settings, VLANs, routing protocols, and the running operating system software. In the event of an upgrade failure, such as a corrupted firmware flash or an incompatible configuration, these backups provide the exact files needed to revert the switch to its previous, stable working condition, minimizing downtime and service disruption.
- ✗
Disconnected all redundant links.
Why it's wrong here
Disconnecting all redundant links, while sometimes performed to simplify network topology during major changes or to prevent potential loops during specific reconfigurations, does not directly aid in restoring a switch after a failed upgrade. This action primarily affects network path redundancy and Spanning Tree Protocol (STP) convergence. It does not provide a means to recover the switch's corrupted firmware, restore its previous configuration, or revert to a stable operating state if the upgrade process itself encounters an error.
When this WOULD be correct
When performing maintenance that could cause network instability or loops (e.g., upgrading multiple switches with redundant paths), disconnecting redundant links prevents broadcast storms and ensures a stable environment for the upgrade.
- ✗
Set the switch to boot from an alternative image.
Why it's wrong here
Setting the switch to boot from an alternative image is a potential recovery mechanism, but it is not a primary preparatory step for ensuring full restoration to the previous state after a failed upgrade. This action only dictates which image the switch attempts to load upon reboot. If the alternative image is not the original, known-good firmware, or if the configuration itself becomes corrupted during the upgrade, simply pointing to another image will not guarantee a complete rollback to the exact pre-upgrade operational state. A comprehensive backup is still required for true restoration.
When this WOULD be correct
This option would be correct in a scenario where the switch has multiple firmware images stored and the administrator wants to test a new image while keeping the ability to revert to the current one by simply changing the boot variable, without needing a separate backup.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓Backed up the current configuration and firmware image.Correct answer▾
Why this is correct
Backing up the current configuration and firmware image is the most critical preparatory step for any network device upgrade. This action creates a complete snapshot of the device's operational state, including all settings, VLANs, routing protocols, and the running operating system software. In the event of an upgrade failure, such as a corrupted firmware flash or an incompatible configuration, these backups provide the exact files needed to revert the switch to its previous, stable working condition, minimizing downtime and service disruption.
✗Notified all users of the maintenance window.Wrong answer — click to see why▾
Why this is wrong here
Notifying users of the maintenance window is a communication best practice but does not provide a technical rollback mechanism for a failed firmware upgrade.
★ When this WOULD be the correct answer
A question asks: 'A network administrator is planning a firmware upgrade on a core switch. Which step should be taken to minimize user impact?' In that context, notifying users of the maintenance window would be correct to set expectations and reduce disruption.
Why candidates choose this
Candidates may confuse general change management procedures (like user notification) with the specific technical steps required to enable a rollback after a failed upgrade.
✗Disconnected all redundant links.Wrong answer — click to see why▾
Why this is wrong here
Disconnecting redundant links does not facilitate a rollback of the firmware upgrade; it only prevents network loops during the upgrade but does not preserve the previous operational state.
★ When this WOULD be the correct answer
When performing maintenance that could cause network instability or loops (e.g., upgrading multiple switches with redundant paths), disconnecting redundant links prevents broadcast storms and ensures a stable environment for the upgrade.
Why candidates choose this
Candidates may think that removing redundancy simplifies the upgrade process and reduces the risk of issues, but it does not address the need to restore the switch to its previous state after a failed boot.
✗Set the switch to boot from an alternative image.Wrong answer — click to see why▾
Why this is wrong here
Setting the switch to boot from an alternative image does not ensure a rollback to the previous operational state if the new firmware fails; it only changes the boot order. The administrator needs a backup of the current firmware and configuration to restore after a failed upgrade.
★ When this WOULD be the correct answer
This option would be correct in a scenario where the switch has multiple firmware images stored and the administrator wants to test a new image while keeping the ability to revert to the current one by simply changing the boot variable, without needing a separate backup.
Why candidates choose this
Candidates may think that booting from an alternative image is a quick rollback method, confusing it with having a backup image already stored on the device, but they overlook that the alternative image might not be the previous working version.
Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Network Documentation and Diagrams
Key term
Firmware
Firmware is specialized software permanently stored in read-only memory on a hardware device that controls how that device operates at a basic level.
Key term
Backup
A backup is a copy of computer data taken and stored separately so that the original data can be restored if it is lost, damaged, or corrupted.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This N10-009 practice question is part of Courseiva's free CompTIA 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 N10-009 exam.