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| Section | Objectives |
|---|---|
| Basic Traffic and Service Concepts | - Load balancing fundamentals
|
| BIG-IP Platform Fundamentals | - F5 BIG-IP architecture overview
|
| Software Upgrade and Maintenance | - Rollback and recovery
|
| System Configuration and Management | - System objects
|
| Initial Installation and Setup | - Deployment options
|
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NEW QUESTION # 26
The BIG-IP Administrator uses Secure Copy Protocol (SCP) to upload a TMOS image to the /shared/images/ directory in preparation for an upgrade.
After the upload is complete, what will the system do before the image appears in the GUI under:
System > Software Management > Image List ?
Answer: A
Explanation:
When a TMOS ISO file is transferred to /shared/images/ , the BIG-IP automatically performs a validation step:
Checksum Verification
* Before the image becomes visible in the GUI, the system verifies the internal checksum embedded inside the ISO.
* This ensures:
* The file was fully transferred
* The image is not corrupted
* It matches the official F5 release signature
* Only after passing this verification does the GUI display the ISO under "Available Images." Why the other options are incorrect:
A). Reboot into a new partition
* No reboot occurs simply from uploading an image.
C). Copying into /var/local/images/
* This directory is not used for ISO storage.
* All valid images remain in /shared/images/ .
Thus, the correct system action is checksum verification .
NEW QUESTION # 27
Which option in the BIG-IP Configuration utility is used to configure the system's routes?
Answer: B
Explanation:
Routing settings for the BIG-IP system can be configured under System > Network > Routes in the Configuration utility.
NEW QUESTION # 28
The BIG-IP Administrator wants to manage the newly built F5 system through an in-band Self-IP.
The administrator has configured a VLAN and Self-IP and can ping the IP from their workstation, but cannot access the system via SSH or HTTPS.
What port lockdown settings should the BIG-IP Administrator use to allow management access on the Self-IP? (Choose two.)
Answer: B,C
Explanation:
Self-IPs include a security feature called Port Lockdown, which restricts which services respond on that Self-IP.
By default, Self-IPs block management access (SSH and HTTPS/TMUI), meaning an administrator cannot manage the device through in-band Self-IPs unless explicitly allowed.
Allow Mgmt / Allow Management
These settings enable only the management services required for administrative access, specifically:
SSH (22)
HTTPS/TMUI (443)
These options allow secure administration without opening unnecessary ports.
Why these are correct:
They provide only the essential access for management.
They follow F5 security best practices when using in-band admin access.
They do not expose all services, reducing the attack surface.
NEW QUESTION # 29
A BIG-IP Administrator is responsible for deploying a new software image on an F5 BIG-IP HA pair and has scheduled a one-hour maintenance window.
With a focus on minimizing service disruption, which of the following strategies is the most appropriate?
Answer: C
Explanation:
For BIG-IP high-availability (HA) pairs, F5's recommended upgrade workflow prioritizesservice continuity, predictable failover, andminimal downtime. The established best-practice sequence is:
* Upgrade the standby unit first
* Because the standby device is not passing traffic, upgrading and rebooting it does not impact production.
* Boot the standby unit into the newly installed version
* Once online, the administrator verifies basic health, device sync status, cluster communication, and module functionality.
* Perform a controlled failover to the upgraded unit
* Traffic shifts to the newly upgraded device, allowing validation of the configuration and operational behavior under real traffic loads.
* Upgrade the second device (now standby)
* The previously active device becomes standby after failover, allowing it to be safely upgraded and rebooted without interruption.
This phased approach ensures only one device is unavailable at a time, allowing continuous traffic flow throughout the upgrade process.
Why the Correct Answer is C
OptionCexactly matches F5's documented production-safe upgrade method:
* Upgrade thestandbynode first
* Reboot into new image
* Failover to upgraded device
* Validate
* Upgrade the remaining (now-standby) device
This procedure minimizes risk and traffic disruption.
Why the other options are incorrect:
A). Upgrade the active node first
* Upgrading the active device requires removing it from service and failing over abruptly. This is not recommended and increases service disruption risk.
B). Resetting device trust
* Resetting trust is unnecessary and can disrupt configuration sync, peer communication, and cluster operation. It is not part of any standard upgrade workflow.
D). Upgrading and rebooting both nodes simultaneously
* This would causetotal outage, because both HA members would be unavailable at the same time.
NEW QUESTION # 30
Which of the following are resource allocation settings for modules? (Pick the 2 correct responses below)
Answer: C,D
Explanation:
When provisioning modules on a BIG-IP system, F5 provides specific resource allocation settings that define how system resources -- CPU, memory, and disk -- are distributed to each licensed module. The two valid and officially recognised allocation settings are Nominal and Dedicated.
Nominal instructs the system to allocate a moderate, balanced share of resources to the module.
It allows the module to function effectively while sharing system resources with other provisioned modules. This is the most commonly used setting in multi-module deployments.
Dedicated allocates the maximum available system resources exclusively to a single module.
When this setting is applied, it is typically the only module provisioned, as it consumes resources at a level that prevents other modules from operating concurrently in a meaningful capacity.
NEW QUESTION # 31
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