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F5 F5CAB4 Exam Overview:

Certification Vendor:F5
Exam Name:BIG-IP Administration Control Plane Administration
Exam Number:F5CAB4
Related Certifications:F5 Certified Administrator, BIG-IP (F5-CA, BIG-IP)
Passing Score:245 / 350
Real Exam Qty:30
Exam Price:USD 50 (Online), USD 65 (Test Center)
Exam Duration:30 minutes
Certificate Validity Period:No fixed expiration; recertify per F5 policy
Exam Format:Scenario-based questions, Multiple choice
Available Languages:English
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

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F5 F5CAB4 Prüfungsplan:

ThemaEinzelheiten
Thema 1
  • 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.
Thema 2
  • Identify configured system services: This domain covers verifying proper configuration of essential services including DNS, NTP, SNMP, and syslog.
Thema 3
  • 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.
Thema 4
  • Given a scenario, interpret Service status: This section teaches interpreting service states, analyzing netstat output, and determining whether services are listening on specific ports.
Thema 5
  • 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.
Thema 6
  • 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.

F5 BIG-IP Administration Control Plane Administration F5CAB4 Prüfungsfragen mit Lösungen (Q43-Q48):

43. Frage
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?

Antwort: B

Begründung:
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>.


44. Frage
A BIG-IP Administrator needs to export system configuration for migration purposes. Which file type should be used?

Antwort: D

Begründung:
In F5 TMOS, a User Configuration Set (UCS) is the standard archive format used for backing up and migrating a complete system configuration .
* Composition: A UCS file contains all necessary configuration data, including system-specific files, license information, SSL certificates, private keys, and local user accounts.
* Procedural Use: When migrating to new hardware or performing an RMA replacement, the UCS file is the primary tool used to restore the entire Control Plane state to the new device.
* Restoration: It can be managed through the Configuration Utility under System > Archives or via the CLI using the tmsh load /sys ucs command The correct location to restrict management access to specific subnets is D. System > Platform1.


45. Frage
A BIG-IP Administrator finds the following log entry:
tnm tmm[7141]: 011e0002:4: sweeper_update: aggressive mode activated.
Which action should the BIG-IP Administrator take to mitigate this memory issue?

Antwort: D

Begründung:
This log message indicates that the system is low on memory and has activated 'Aggressive Mode' to reclaim resources by closing old connections. In an HA environment, one way to ensure state stability during memory pressure is to manage how connection data is handled. While the document suggests D, procedural mitigation for 'Aggressive Mode' often involves reviewing resource provisioning or optimizing connection idle timeouts to reduce memory footprint.


46. Frage
A BIG-IP Administrator needs to update the license on a BIG-IP device. Where can this be done?

Antwort: B

Begründung:
Managing the license is a primary Control Plane task required to activate software modules and features on a BIG-IP device.
* License Management Utility: All actions related to the device license, including initial activation, renewal, and adding add-on keys, are performed under the System > License section of the Configuration Utility.
* Procedural Requirements: Licensing often requires the generation of a "dossier," which is a unique encrypted string used by the F5 License Server to generate the final license file.
* Impact on Services: Updating or re-activating a license generally requires a restart of system services (such as the tmm daemon), which will temporarily disrupt traffic processing unless performed on a standby unit in a high availability pair.
* Add-on Licenses: If an administrator needs to increase the capacity of a specific module (like increasing the SSL TPS limit or adding a new module like ASM), the new registration keys are entered through this same interface using the "Re-activate" button.


47. Frage
A BIG-IP Administrator is unable to connect to the management interface via HTTPS. What is a possible reason for this issue?

Antwort: D

Begründung:
Management connectivity is protected by an allowed access list for the httpd daemon. Unlike TMM data ports which use ' Port Lockdown ' settings, the management port ' s access is controlled by a specific ' Allow ' list.
If an administrator ' s IP is not explicitly included in this list, the Control Plane will reject HTTPS connection attempts to the management utility.


48. Frage
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