F5 Updated F5CAB4 Exam Questions and Answers by kaden

watch-devicegroup-device shows (among other columns) the commit ID (cid.id / shown here as clu_id), the originating device for that commit (cid-orig / shown here as cl_orig), and the time the configuration change was made (cid.time / shown here as cl_time). The highest/newest commit ID and its time represent the most recent configuration change seen among the devices. ( clouddocs.f5.com )

bigip_a has the latest configuration (A) because it shows commit ID 3273 at 14:27:00 , which is newer than commit ID 1745 at 13:52:34 on bigip_b and bigip_c. ( clouddocs.f5.com )

Two devices are out of date (B) because bigip_b and bigip_c are still on the older commit ID 1745 , so they do not match the latest commit shown on bigip_a. ( clouddocs.f5.com )

Why the other options are not supported by this output:

C is not supported : bigip_c is not showing a newer commit than the others; it’s on the older commit (1745), so it’s not the source of the most recent change. The output’s cid-orig column is what tells you where the change was made. ( clouddocs.f5.com )

D/E are incorrect logic : matching cid.time between two devices only indicates they share the same change timestamp/commit , not that it is the correct or latest configuration. The “latest” is indicated by the newest commit ID/time (here, bigip_a). ( clouddocs.f5.com )

Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Adminis44tration documents: In a45n Active/Standby HA pair, application traffic only flows through the Active device. If an administrator makes a change on the Standby device (which has no traffic), they must synchronize the configuration to the Active device to test it. The procedural step is to log into the Active device and " pull " the configuration from the Standby device (or push from Standby) so the Active device can process traffic using the new iRule

On a BIG-IP system, NTP (Network Time Protocol) configuration is part of the system-level configuration settings . In the Configuration Utility, NTP servers are configured under the System configuration hierarchy .

The correct navigation path is:

System > Configuration > Device > NTP

This location allows the administrator to:

Add, modify, or remove NTP servers

Ensure accurate system time synchronization

Maintain proper time alignment required for features such as ConfigSync , HA failover , logging, and certificate validation

Why the other options are incorrect:

A. System > Platform is used for hardware-related settings.

B. System > Preferences manages UI and user preferences.

C. System > Services controls system daemons and services, not time configuration.

Therefore, the correct answer is D. System > Configuration .

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Management access security is a primary Control Plane configuration task3.

Management Interface Security: The BIG-IP system provides a dedicated management port that is separate from the TMM (Traffic Management Microkernel) data interfaces 4444 .

System Platform Settings: Under the System > Platform section of the Configuration Utility, an administrator can define specific IP addresses or subnets that are permitted to access the device via SSH or HTTPS (the GUI).

Port Lockdown Difference: While " Port Lockdown " settings under Network > Self IPs control access to the device through self-IP addresses on data VLANs, they do not manage the security of the dedicated management port .

Access Control Lists: For robust security, F5 recommends using the " IP Allow " or " httpd Allow " lists found in the platform settings to prevent malicious brute-force attempts or unauthorized access from non-management networks .