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F5 Networks F5CAB4 Exam Questions

Exam Name: F5 Networks BIG-IP Administration Control Plane Administration Exam
Exam Code: F5CAB4
Related Certification(s): F5 Networks F5 Certified Administrator, BIG-IP Certification
Certification Provider: F5 Networks
Number of F5CAB4 practice questions in our database: 67 (updated: Jun. 02, 2026)
Expected F5CAB4 Exam Topics, as suggested by F5 Networks :
  • Topic 1: Apply procedural concepts required to manage the state of a high availability pair: This domain covers controlling and monitoring failover states in high availability pairs, including forcing standby/offline modes, reporting failover status, and verifying device trust.
  • Topic 2: Identify management connectivity configurations: This section focuses on understanding management access configurations, including management IP addresses, port lockdown settings, remote connectivity verification, and troubleshooting access issues.
  • Topic 3: Identify and report current device status: This domain covers monitoring BIG-IP operational status through LCD panels, dashboards, Network Map, GUI/TMSH commands, and checking high availability states.
  • Topic 4: List which log files could be used to find events and/or hardware issues: This section teaches identification of key log files (/var/log/ltm, secure, audit), understanding event severity levels, and interpreting log messages.
  • Topic 5: Apply procedural concepts required to create, manage, and restore a UCS archive: This domain covers UCS backup and restore procedures, understanding backup use cases, proper storage practices, and UCS file contents including private keys.
  • Topic 6: Explain authentication methods: This section focuses on user management including creating/modifying users, configuring remote authentication providers, and implementing group-based access control.
  • Topic 7: Identify configured system services: This domain covers verifying proper configuration of essential services including DNS, NTP, SNMP, and syslog.
  • Topic 8: Explain config sync: This section focuses on configuration synchronization procedures, identifying sync errors, determining sync necessity, checking sync status, and comparing configuration timestamps.
  • Topic 9: Given a scenario, determine device upgrade eligibility: This domain covers determining appropriate timing for software and platform upgrades and strategies to minimize downtime during upgrades.
  • Topic 10: Given a scenario, interpret Service status: This section teaches interpreting service states, analyzing netstat output, and determining whether services are listening on specific ports.
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Ryan Perez

3 days ago
Management connectivity items showed up as multiple-choice troubleshooting vignettes that asked which interface or route would restore access. A teammate passed recently and recommends studying management IP versus self IP, out-of-band access, and common recovery commands so you can map symptoms to the right configuration change.
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Carol Walker

22 days ago
I just cleared the F5 F5CAB4 and the HA pair questions were the most time consuming, so practicing failover steps and knowing what changes state actually helped me finish confidently. The exam felt fair if you have hands on time with device status and config sync behavior.
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Rachel Nguyen

1 month ago
Failover and HA pair state questions often present a broken sync or split-brain scenario where you must choose the correct remediation sequence. I passed the exam and thanks Pass4Success for providing good collection of exam questions for preparation in short time, focus on the HA state machine, forced failover steps, and how config sync modes affect recovery.
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Sharon White

1 month ago
I had a scenario-based question on config sync that required identifying which unit would push changes and whether a full or partial sync was needed. Practicing tmsh commands and reviewing the HA state flow really helped.
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Jason Robinson

1 month ago
Noticed the F5 Networks exam liked to mix config sync with authentication methods in one scenario, which made isolating the root cause a bit tricky.
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Tiffany Smith

1 month ago
Remember to practice creating and restoring UCS archives from the CLI since partial restores showed up in a couple of situational items.
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Kenneth Gonzalez

1 month ago
Surprisingly a question about device upgrade eligibility expected you to consider installed hotfixes and compatibility matrices, so review upgrade prerequisites closely.
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Melissa Ramirez

1 month ago
Also double-checking which log files to inspect, like ltm and tmm logs, saved me time when diagnosing failover behavior.
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Ryan Phillips

1 month ago
Another confusing area was interpreting Service status where a service appeared running but failed health checks, and checking bigstart and systemd output cleared it up.
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Timothy

2 months ago
I felt tense and overwhelmed at first, but Pass4Success broke it down into manageable steps and real-world simulations, helping me stay calm and prepared—believe in yourself, test-takers!
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Lelia

2 months ago
F5 policy deployment was a nightmare at first—policies, pools, profiles all chaining together. Pass4Success practice exams gave me a clear mental map of what to check first.
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Markus

3 months ago
The hardest topic was SSL offloading config and certificate management within the admin plane. Pass4Success practice questions drilled the exact sequences I kept second-guessing.
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Youlanda

3 months ago
Just aced the F5 BIG-IP exam, thanks to the helpful resources from Pass4Success.
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Nieves

3 months ago
F5 BIG-IP exam was challenging, but I made it! Appreciate Pass4Success.
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Joanna

3 months ago
Expect to see questions on BIG-IP deployment architectures, including single-tier, multi-tier, and hybrid cloud setups. Understand the design considerations for different deployment scenarios.
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Marylin

4 months ago
The exam may test your knowledge of BIG-IP advanced traffic management features, such as connection mirroring, persistence, and rate shaping. Review these performance optimization techniques.
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Gayla

4 months ago
The initial nerves hit hard before the exam, yet Pass4Success gave me practical scenarios and steady practice that boosted my confidence—keep practicing, and you’ll pass with flying colors!
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Valentin

4 months ago
Passed the F5 BIG-IP exam! Thanks to Pass4Success for the great prep material.
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Tanesha

4 months ago
I was nervous at the start, worried I wouldn’t grasp the Control Plane basics, but Pass4Success helped me build confidence with focused labs and clear explanations, and now I’m ready to tackle tougher challenges—you’ve got this, future examinees!
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Mabel

5 months ago
Passing the F5 BIG-IP exam was a game-changer for me. The Pass4Success practice exams were key - they really helped me identify my weak areas and focus my studying.
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Ilona

5 months ago
I struggled with BIG-IP device management tasks in the control plane, especially the provisioning workflows. Pass4Success practice exams framed the questions like real admin scenarios, which helped me stay calm on test day.
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Josphine

5 months ago
I just nailed the exam by focusing on the UCS archive concept; the practice questions from Pass4Success helped me map out the steps to create, test, and restore a UCS archive, and I walked away confident that even if a question on the archive integrity seemed tricky, I could apply the restore procedure with the right sequence and verification checks. One question that stuck with me asked to detail the exact order of steps to generate a UCS, verify its contents, and then restore it on a different device, including what to do if the UCS file fails signature verification. I was unsure about the signature verification nuance, but I still passed thanks to solid practice and familiarization with the restore flow.
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Tijuana

5 months ago
You may encounter questions on BIG-IP system licensing and provisioning. Know how to manage licenses and allocate resources for your deployment.
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Isaiah

6 months ago
The toughest part for me was mastering iRules and how they interact with the BIG-IP Virtual Editions in the admin plane; Pass4Success drills mirrored those tricky edge cases and showed me common pitfalls I’d overlook.
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Free F5 Networks F5CAB4 Exam Actual Questions

Note: Premium Questions for F5CAB4 were last updated On Jun. 02, 2026 (see below)

Question #1

Refer to the exhibit.

The BIG-IP Administrator is investigating disk utilization on the BIG-IP device. What should the BIG-IP Administrator check next? (Choose one answer)

Reveal Solution Hide Solution
Correct Answer: C

When troubleshooting a BIG-IP system where a partition is reported as full (100% utilization), identifying and removing large or unnecessary files is the immediate next step for restoration of system stability.

Symptoms of Full Partitions: If a file system (such as the root / or /var) becomes full, it can result in unpredictable system behavior, failure to save configurations, and the inability to log in to the Web UI.

The Root (/) Partition: This partition is intentionally kept small on F5 systems. It is highly sensitive to the storage of third-party software or diagnostic files that should ideally be stored in the /shared or /var directories.

Procedural Resolution: To resolve 100% disk usage, administrators should check for large files on the affected partition using CLI commands like du -ah or find / -xdev -type f -exec du {} \; | sort -rn | head -20.

Common Culprits: Large files typically causing these issues include old core files, tech support bundles, large diagnostic logs (packet diags), or temporary files created during administrative tasks.

Diagnostics vs. Remediation: While tests like the EUD (End User Diagnostics) or platform diagnostics are useful for hardware verification, they do not resolve file system exhaustion issues that have already reached a critical 100% state.


Question #2

A user needs to generate a QKView to upload to iHealth to determine any issues with upgrading TMOS. Where can the user generate the QKView in the Configuration Utility?

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Correct Answer: D

Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: Generating a QKView is a standard procedure for identifying device health and upgrade readiness42. Within the Configuration Utility, this Control Plane diagnostic tool is located under System > Support43. This utility collects configuration and state data into a single file used by the iHealth 'Upgrade Advisor' to report on known bugs or compatibility issues prior to a version change.


Question #3

Which method is recommended for creating a new user from the CLI? (Choose one answer)

Reveal Solution Hide Solution
Correct Answer: A

Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:

The recommended and supported method for creating BIG-IP users from the CLI is through TMSH, using the authentication subsystem.

tmsh create auth user <username> prompt-for-password:

Properly creates the user within BIG-IP's AAA/authentication framework

Encrypts the password securely

Ensures the user is stored and managed correctly in the BIG-IP configuration database

Is fully supported and documented

Why the other options are incorrect:

B is unsafe and unsupported because editing bigip.conf directly and storing clear-text passwords violates security and configuration management best practices.

C (f5adduser / f5passwd) is deprecated and not recommended for modern BIG-IP versions.

D creates a Linux system user only, not a BIG-IP administrative user, and will not allow access to the Configuration Utility or TMSH roles.


Question #4

When looking at this BIG-IP prompt: root@virtual-bigip1] Peer Time Out of Sync

What does the message indicate? (Choose one answer)

Reveal Solution Hide Solution
Correct Answer: D

Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:

On BIG-IP systems that participate in a Device Service Cluster (DSC), each device compares the remote device's system time to its own system time. If the difference is outside the ConfigSync time threshold (commonly referenced as 3 seconds by default), BIG-IP updates the shell prompt to show ''Peer Time Out of Sync'', and ConfigSync operations may fail until time is corrected (typically by fixing NTP reachability/configuration, or in some cases adjusting the threshold). (cdn.studio.f5.com)

This message is specifically about time drift between peers in the trust domain/DSC---not basic reachability (so B is not what it means), and it does not prove which side is ''correct'' (so C is too specific). It also doesn't directly mean an NTP source is ''skewed'' (A can be a cause, but the prompt message itself indicates the peer-to-peer time mismatch condition). (cdn.studio.f5.com)


Question #5

A configuration change is made on the standby member of a device group. What is displayed as "Recommended Action" on the Device Management Overview screen?

Reveal Solution Hide Solution
Correct Answer: D

Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: The BIG-IP Control Plane monitors the 'Commit ID' of the configuration on all group members. When a change is made on the Standby unit, it becomes the member with the most recent configuration. The 'Recommended Action' in the HA status dashboard will be to synchronize that specific device's configuration to the rest of the group to ensure consistency


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