F5CAB1 Practice Test 2 — 10 Questions

Question 1

An administrator is upgrading a BIG-IP from version 15.1 to 17.1. After the upgrade, the administrator notices that the device is not passing traffic and the TMOS logs show that the TMM process failed to start. Which action should the administrator take first to resolve the issue?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Check the /var/log/ltm and /var/log/tmm logs for specific error messages related to the TMM failure.. When TMM fails to start after an upgrade, the first step is to examine the logs for specific errors. The logs in /var/log/ltm and /var/log/tmm provide detailed information that can pinpoint the cause, such as a configuration object that is incompatible with the new version. Based on the error, the administrator can decide whether to fix the configuration, apply a patch, or roll back.

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Reinstall the new software image using the tmsh command install sys software.

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Reboot the BIG-IP into the previous software volume and restore the UCS backup.

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Disable the TMM process and restart the BIG-IP to allow traffic to flow using the host processor.

Question 2

Refer to the exhibit. An administrator receives this error when attempting to install a new software version. What is the most appropriate remediation step?

Accepted Answer

Delete an old, unused software volume.. The 'No space left on device' error indicates the target boot location is full. The administrator must delete an unused software volume to reclaim space. Managing boot locations is a standard administrative task in BIG-IP environments, ensuring that at least one volume remains available for future upgrades or rollbacks, thereby maintaining system reliability during the transition to new software versions.

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Expand the virtual disk in the hypervisor.

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Run 'touch' on the partition to clear logs.

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Perform a 'factory reset' of the device.

Question 3

An administrator is preparing to upgrade a BIG-IP from version 14.1.4 to 16.1.2. The administrator runs the command 'tmsh show sys software' and sees that the new version is installed but not active. The administrator then reboots the system. After the reboot, the administrator checks the active software version and finds it is still 14.1.4. What is the most likely reason?

Accepted Answer

The administrator did not set the new version as the active boot location.. After installing a new software version, it is placed in a separate boot location. To activate it, the administrator must set that boot location as the default boot target, typically using 'tmsh set sys software volume <volume> active' or via the GUI. Rebooting alone will boot the previously active volume. This is a common oversight during upgrades and leads to the old version remaining active.

Answer

The administrator did not run the 'tmsh install sys software' command to finalize the installation.

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The administrator did not create a UCS backup before the upgrade.

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The upgrade failed because the administrator did not run the 'tmsh load sys config' command.

Question 4

An administrator is setting up a BIG-IP for the first time. Why is it important to configure the 'Management Port' before running the setup wizard?

Accepted Answer

To ensure secure administrative access to the device.. The management port provides the dedicated out-of-band pathway for configuration and maintenance of the BIG-IP device. By ensuring this is set up correctly, the administrator guarantees that the appliance is reachable for remote management tasks. This is a foundational configuration step because without it, the administrator cannot access the web interface or CLI remotely to finalize the more complex traffic management configuration required for the production application delivery environment.

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To enable traffic processing for the data plane.

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To allow the device to synchronize configuration between peers.

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To allow the device to connect to the Internet for updates.

Question 5

What is the primary function of the 'Provisioning' tab in the BIG-IP system?

Accepted Answer

To allocate system resources to specific modules.. Provisioning controls the allocation of CPU and memory resources to specific modules like LTM, ASM, or APM. This is crucial because it defines what services the BIG-IP can provide. Mismanagement here can lead to resource starvation for critical applications, so understanding how to balance these resources based on hardware capacity is a key skill for F5 administrators managing performance in production environments.

Answer

To install new software versions.

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To configure virtual server IP addresses.

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To manage user accounts and permissions.

Question 6

A network administrator is performing the initial configuration of a new BIG-IP appliance. The administrator needs to assign a management IP address, set the hostname, and configure DNS and NTP settings. Which interface should be used for management access by default?

Accepted Answer

MGMT interface. The MGMT interface is the dedicated out-of-band management interface on a BIG-IP appliance. It is preconfigured with a default IP address and is used for initial setup, remote administration, and system maintenance. Configuring the management IP on this interface ensures that management traffic is isolated from data traffic, which is a best practice for security and performance.

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VLAN interface

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Loopback interface

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1.1 interface

Question 7

During an initial configuration, an administrator is asked to set the 'Host Name'. Why is it critical to set a unique and descriptive host name?

Accepted Answer

It is needed for log identification.. A unique host name is essential for identifying individual devices within a cluster, especially in HA configurations. In logs and alerts, the host name allows administrators to quickly pinpoint which node is reporting an event. Proper naming conventions prevent confusion during management tasks and troubleshooting, ensuring that configuration changes are applied to the correct unit without ambiguity, which is critical for consistent operational management.

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It is required for the licensing process.

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It dictates the management IP address.

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It is used by the client browser for SSL.

Question 8

An administrator needs to upgrade a VIPRION chassis running TMOS v14.1 to v16.1. Before initiating the software installation, what critical step must be performed on the blade architecture to ensure a successful upgrade without split-brain cluster issues?

Accepted Answer

Provision all software slots on every individual blade within the chassis with the target TMOS version image before activating.. VIPRION chassis deployments require independent software installations on both the primary and secondary slots to maintain operational synchronicity across the cluster. Failing to install the target image on all constituent blades before booting into the new version causes version mismatches, cluster communication failures, and potential split-brain conditions that disrupt enterprise traffic processing.

Answer

Disable high availability stateful mirroring across all virtual servers to prevent packet buffer corruption during slot reboot.

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Eject the secondary blades from the chassis physically until the primary blade finishes the complete TMOS installation.

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Convert the multi-slot chassis into a standalone non-clustered architecture through the command line interface temporarily.

Question 9

When installing BIG-IP software, what is the purpose of the 'Install Configuration' option during the process?

Accepted Answer

To migrate settings from the previous version.. The 'Install Configuration' option determines whether the existing configuration from the previous software version is imported into the new installation. This is a critical convenience feature that minimizes manual reconfiguration efforts after an upgrade. By selecting this option, the administrator ensures that virtual servers, policies, and network settings are automatically migrated, allowing for a seamless transition between software versions and maintaining service continuity without significant manual intervention.

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To reset the system to factory defaults.

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To install the base OS drivers only.

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To verify the license key validity.

Question 10

An administrator is preparing to install a new version of BIG-IP software. Which TWO steps are considered best practices to perform before initiating the installation?

Accepted Answer

Create a full User Configuration Set (UCS) archive.. Preparing for a BIG-IP upgrade requires careful planning to prevent data loss and ensure system stability. Creating a UCS archive provides a full backup of the configuration, allowing for restoration if the upgrade causes corruption. Checking the release notes is equally critical, as they detail specific upgrade paths, known issues, and hardware compatibility requirements that can prevent a catastrophic failure during the transition to the new software release.

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Disable all Virtual Servers to prevent traffic.

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Reset the management interface to factory defaults.

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Delete all existing SSL certificates.