F5CAB4 Online Practice Questions

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The practice questions for F5CAB4 exam was last updated on 2026-01-07 .

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Question#1

A BIG-IP Administrator makes a configuration change to a Virtual Server on the Standby device of an HA pair. The HA pair is currently configured with Auto-Sync Enabled.
What effect will the change have on the HA pair configuration?

A. The change will be undone when Auto-Sync propagates the config to the HA pair.
B. The change will be propagated next time a configuration change is made on the Active device.
C. The change will be undone next time a configuration change is made on the Active device.
D. The change will take effect when Auto-Sync propagates the config to the HA pair.

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administratio24n Control Plane Administration documents: TMOS Device Service Cluste25ring (DSC) allows for configuration changes to be made on any device within a synchronization group. If Auto-Sync is enabled, the Control Plane detects the change on the Standby unit and automatically propagates (pushes) that updated configuration to the other members of the HA pair

Question#2

A configuration change is made on the standby member of a device group.
What is displayed as "Recommended Action" on the Device Management Overview screen?

A. Force active member of device group to standby
B. Activate device with the most recent configuration
C. Synchronize the active member configuration to the group.
D. Synchronize the standby member configuration to the group

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: The BIG-IP Control Plane monitors the "Commit ID" of the configuration on all group members. When a change is made on the Standby unit, it becomes the member with the most recent configuration. The "Recommended Action" in the HA status dashboard will be to synchronize that specific device's configuration to the rest of the group to ensure consistency

Question#3

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?

A. Configure the redundant pair to be active-active
B. Decrease the TCP profile Idle Timeout value
C. Increase the TCP profile Idle Timeout value
D. Configure the server to use Connection Mirroring

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: This log message indicates that the system is low on memory and has activated 'Aggressive Mode' to reclaim resources by closing old connections37. In an HA environment, one way to ensure state stability during memory pressure is to manage how connection data is handled38. While the document suggests D, procedural mitigation for 'Aggressive Mode' often involves reviewing resource provisioning or optimizing connection idle timeouts to reduce memory footprint39.

Question#4

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?

A. Disable the device group
B. Remove all members from the device group
C. Remove the decommissioned device from the device group
D. Make sure all members of the device group are in sync

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: To maintain integrity in a High Availability environment, TMOS prevents the deletion of active Devic28e Groups. Procedurally, a device group is a container for synchronization; the Control Plane requires that you first strip the group of all associated members (devices) before the group object itself can be removed from the configuration.

Question#5

The BIG-IP system is provisioned for LTM only. The BIG-IP Administrator is tasked with provisioning ASM.
What process restarts when the BIG-IP Administrator changes the module provisioning? (Choose one answer)

A. bd
B. tmm
C. sshd
D. httpd

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
When a BIG-IP Administrator changes module provisioning (for example, enabling ASM on a system previously provisioned only for LTM), the BIG-IP system must restart the Traffic Management Microkernel (TMM) process.
The TMM process is responsible for:
Traffic handling
LTM, ASM, and other traffic-processing modules
Enforcing security and application policies
Provisioning changes affect how traffic modules are loaded and integrated into TMM. As a result, TMM is restarted, which causes a temporary interruption of traffic processing. This is expected behavior and is why module provisioning changes should be planned during a maintenance window.
Why the other options are incorrect:
A. bd is related to blade/platform management, not module provisioning.
C. sshd handles SSH access and is not affected by provisioning changes.
D. httpd supports the Configuration Utility (GUI) and does not restart due to module provisioning.
Therefore, the correct answer is B. tmm.

Disclaimer

This page is for educational and exam preparation reference only. It is not affiliated with F5, F5-CA, or the official exam provider. Candidates should refer to official documentation and training for authoritative information.

Exam Code: F5CAB4Q & A: 53 Q&AsUpdated:  2026-01-07

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