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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Control Plane Administration |
| Exam Number: | F5CAB4 |
| Real Exam Qty: | 30 |
| Exam Price: | $50 USD |
| Exam Duration: | 30 minutes |
| Related Certifications: | F5 Certified Administrator, BIG-IP (F5-CA) |
| Exam Format: | Scenario-based, Multiple Choice |
| Available Languages: | English |
| Sample Questions: | F5 F5CAB4 Sample Questions |
| Exam Way: | Pearson VUE Testing Centers (Online proctored option may be available) |
| Pre Condition: | Recommended: Basic understanding of network concepts and previous completion of F5CAB1 or equivalent experience. |
| Official Syllabus URL: | https://education.f5.com/course/view/1091 |
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NEW QUESTION # 53
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: D
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 # 54
A BIG-IP Administrator needs to verify system time synchronization. Where should this be checked?
Answer: A
NEW QUESTION # 55
A BIG-IP Administrator receives an RMA replacement for a failed F5 device. The Administrator tries to restore a UCS taken from the previous device, but the restore fails. The following error appears in the /var/log/ltm:
insufficient pool members. 01070608:3: License is not operational
(expired, digital signature does not match contents)
What should the BIG-IP Administrator do to avoid this error? (Choose one answer)
Answer: A
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
When restoring a UCS file to replacement hardware (RMA device), the license from the original device is not valid on the new system. If the UCS restore attempts to load the old license, BIG-IP reports license errors such as "License is not operational", which can prevent traffic objects (including pools and virtual servers) from loading correctly.
To avoid this issue, F5 documentation recommends restoring the UCS without the license, using the following command:
tmsh load /sys ucs <ucs filename> no-license
This approach:
Restores all configuration objects (LTM, networking, certificates, keys, etc.) Excludes the invalid license tied to the old hardware Allows the administrator to activate a new license separately on the replacement device Why the other options are incorrect:
A . Remove the license information from the UCS archive
Not supported or recommended; UCS files should not be manually modified.
B . Revoke the license prior to restoring
License revocation does not prevent the UCS from attempting to load license data.
D . Reactivate the license on the new device using the manual activation method This must be done after restoring the UCS and does not prevent the restore failure itself.
Therefore, the correct and supported method to avoid this error is C.
NEW QUESTION # 56
When looking at this BIG-IP prompt: root@virtual-bigip1] Peer Time Out of Sync What does the message indicate? (Choose one answer)
Answer: C
Explanation:
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)
NEW QUESTION # 57
A BIG-IP Administrator needs to update the list of configured NTP servers. In which area of the Configuration Utility should the BIG-IP Administrator perform this update?
Answer: D
Explanation:
NTP (Network Time Protocol) is vital for management connectivity and HA state synchronization. Correct time is required for log timestamping and device trust group communication46. To manage these settings, the administrator navigates to System > Configuration, where general system-level services like NTP and DNS are defined to ensure the Control Plane remains synchronized with the network environment.
NEW QUESTION # 58
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