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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Control Plane Administration |
| Exam Number: | F5CAB4 |
| Exam Duration: | 30 minutes |
| Related Certifications: | F5CAB2 BIG-IP Administration Data Plane Concepts F5CAB5 BIG-IP Administration Support and Troubleshooting F5CAB3 BIG-IP Administration Data Plane Configuration F5CAB1 BIG-IP Administration Install, Initial Configuration, and Upgrade |
| Real Exam Qty: | 25–30 |
| Passing Score: | 245 (scaled score) |
| Exam Price: | USD 50 (online Certiverse) / USD 65 (Pearson VUE test center) |
| Exam Format: | Multiple choice, Scenario-based questions |
| Available Languages: | English |
| Recommended Training: | Administering BIG-IP (F5 Training) Troubleshooting BIG-IP Training |
| Exam Registration: | F5 Certification Portal Official F5 Exam Page |
| Sample Questions: | F5 F5CAB4 Sample Questions |
| Exam Way: | Online proctored (Certiverse) or in-person test center (Pearson VUE) |
| Pre Condition: | No formal prerequisites; part of the F5 Certified Administrator, BIG-IP track (must pass 5 exams in total). |
| Official Syllabus URL: | https://education.f5.com/exams/big-ip-administration-control-plane-administration-f5cab4 |
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NEW QUESTION # 28
Which log file should the BIG-IP Administrator check to determine if a specific user tried to log in to the BIG-IP Configuration Utility? (Choose one answer)
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
On BIG-IP systems, all authentication attempts for administrative access-including logins to the Configuration Utility (GUI)-are logged in /var/log/secure. This log file records:
Successful and failed login attempts
The username used
The authentication method (local, LDAP, RADIUS, etc.)
Access denials and PAM authentication errors
Why the other options are incorrect:
/var/log/pam/tallylog tracks account lockouts and failed attempt counters, not detailed login attempts.
/var/log/ltm logs traffic management events, not administrative authentication.
/var/log/httpd logs web server activity but does not record authentication success or failure for BIG-IP administrative users.
Therefore, the correct log file to verify whether a user attempted to log in to the BIG-IP Configuration Utility is /var/log/secure.
NEW QUESTION # 29
Users report that traffic is negatively affected every time a BIG-IP device fails over. The traffic becomes stabilized after a few minutes. What should the BIG-IP Administrator do to reduce the impact of future failovers?
Answer: D
Explanation:
When a failover occurs, the newly active device must inform the surrounding network that it now "owns" the shared IP addresses. Without MAC Masquerade, the new device uses its own hardware MAC, requiring upstream routers to update their ARP tables (which causes a delay). MAC Masquerading allows the HA pair to share a "floating" MAC address, ensuring the Control Plane transition is transparent to the network layer
NEW QUESTION # 30
A BIG-IP Administrator needs to export system configuration for migration purposes. Which file type should be used?
Answer: C
Explanation:
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.
NEW QUESTION # 31
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: C
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 # 32
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.
NEW QUESTION # 33
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