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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Control Plane Administration |
| Exam Number: | F5CAB4 |
| Certificate Validity Period: | No fixed expiration; recertify per F5 policy |
| Passing Score: | 245 / 350 |
| Available Languages: | English |
| Exam Format: | Multiple choice, Scenario-based questions |
| Related Certifications: | F5 Certified Administrator, BIG-IP (F5-CA, BIG-IP) |
| Exam Duration: | 30 minutes |
| Real Exam Qty: | 30 |
| Exam Price: | USD 50 (Online), USD 65 (Test Center) |
| Recommended Training: | F5 Official Training |
| Exam Registration: | Pearson VUE Certiverse |
| Sample Questions: | F5 F5CAB4 Sample Questions |
| Exam Way: | Online proctored (Certiverse) or Test center proctored (Pearson VUE) |
| Pre Condition: | Basic understanding of BIG-IP installation, configuration and upgrades |
| Official Syllabus URL: | https://education.f5.com/certification/big-ip-administration-control-plane-administration-f5cab4 |
A whole new scope opens up to you and you are immediately hired by reputed firms. Even though theย F5 F5CAB4 certification boosts your career options, you have to pass the F5CAB4 Exam. This F5 F5CAB4 exam serves to filter out the capable from incapable candidates.
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NEW QUESTION # 41
A BIG-IP Administrator uses a device group to share the workload and needs to perform service on a BIG-IP device currently active for a traffic group. The administrator needs to enable the traffic group to run on another BIG-IP device in the device group.
What should the administrator do to meet the requirement? (Choose one answer)
Answer: A
Explanation:
Traffic Groups are the mechanism BIG-IP uses to control which device owns specific application traffic in a high-availability (HA) configuration. When maintenance is required on a device that is currently active for a traffic group, the correct and recommended action is to fail over that traffic group to another device in the device group.
* Failing over the traffic group moves ownership of that traffic group (and the virtual servers associated with it) to another available device without forcing the entire device into standby.
* This allows targeted maintenance while minimizing impact to other traffic groups that may still be active on the device.
Why the other options are incorrect:
* A is unnecessary and incorrect; traffic groups are not recreated for routine maintenance.
* C forces the entire device to standby, which may move more traffic than intended.
* D (Demote) affects device trust/priority behavior and is not the standard or recommended method for moving traffic group ownership.
Therefore, selecting the Traffic Group and choosing Failover is the correct solution.
NEW QUESTION # 42
Refer to the exhibit.
The BIG-IP Administrator runs the command shown and observes a device trust issue between BIG-IP devices in a device group. The issue prevents config sync on device bigip3.local. What is preventing the config sync?
Answer: B
Explanation:
Maintaining an accurate and synchronized clock across all members of a device group is a fundamental requir5ement for the BIG-IP Control P6lane to establis7h and maintain device tru8st9.
* Time Delta Impact: As shown in the exhibit, the "Time Delta to Local Device (sec)" is 12.
* Trust Mechanism: Device trust relies on secure certificate-based communication (SSL/TLS) . If the time difference between devices is too large (typically more than a few seconds), the Control Plane cannot validate the certificates, leading to a failure in the trust relationship .
* ConfigSync Failure: When device trust is broken due to time drift, the systems cannot verify the identity of the peer, which directly prevents the ConfigSync process from executing on the affected device, such as bigip3.local in this scenario.
* Resolution: Administrators must ensure that all devices in a high availability pair are configured to use the same reliable NTP servers to keep their system clocks aligned.
The correct command for restoring an encrypted UCS archive via the command line is D. load /sys ucs < filepath> passphrase <password>.
NEW QUESTION # 43
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)
Answer: B
Explanation:
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.
NEW QUESTION # 44
One of the two members of a device group has been decommissioned. The BIG-IP Administrator tries to delete the device group, but is unsuccessful. Prior to removing the device group, which action should be performed? (Choose one answer)
Answer: A
Explanation:
A BIG-IP device group cannot be deleted if it still contains device members, even if one of those devices has already been decommissioned or is unreachable. Before deleting the device group, the administrator must explicitly remove the decommissioned device from the device group configuration.
Once the removed or unreachable device is deleted from the device group membership, the BIG- IP system allows the remaining administrator to successfully delete the device group.
NEW QUESTION # 45
Users are unable to reach an application. The BIG-IP Administrator checks the Configuration Utility and observes that the Virtual Server has a red diamond in front of the status.
What is causing this issue? (Choose one answer)
Answer: D
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
In the BIG-IP Configuration Utility, status icons provide immediate health information. A red diamond specifically indicates that the object itself is administratively disabled. When a virtual server is disabled, BIG-IP will not accept or process traffic for that virtual server, regardless of pool or node state.
If all pool members were down, the virtual server would typically show a yellow triangle (available but no resources).
If all pool members were disabled, the virtual server would usually still be enabled but unavailable due to pool status, not shown as a red diamond.
Protocol mismatch (HTTPS sent to HTTP) does not change the administrative status icon of the virtual server.
Therefore, the red diamond clearly indicates the virtual server is disabled, making D the correct answer.
NEW QUESTION # 46
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