Pass Guaranteed Quiz 2026 F5 Unparalleled F5CAB1: Answers BIG-IP Administration Install, Initial Configuration, and Upgrade Real Questions

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F5 F5CAB1 Exam Syllabus Topics:

Topic	Details
Topic 1	BIG IP Administration Data Plane Concepts: This section of the exam measures skills of Network Administrators and covers how BIG IP handles application traffic on the data plane. It includes understanding flow of traffic, key data path components, basic concepts of load balancing, and how security and performance features affect user traffic.
Topic 2	BIG IP Administration Data Plane Configuration: This section of the exam measures skills of System Administrators and covers configuring BIG IP objects that control data plane behavior. It focuses on setting up virtual servers, pools, nodes, monitors, and profiles so that applications are delivered reliably and efficiently according to design requirements.
Topic 3	BIG IP Administration Install Initial Configuration and Upgrade: This section of the exam measures skills of System Administrators and covers the lifecycle tasks for deploying and maintaining a BIG IP system. It includes installing the platform, performing initial setup, applying licenses, configuring basic networking, and planning and executing software upgrades and hotfixes.
Topic 4	BIG IP Administration Support and Troubleshooting: This section of the exam measures skills of Network Administrators and covers identifying and resolving common issues that affect BIG IP operation. It focuses on using logs, statistics, diagnostic tools, and basic troubleshooting methods to restore normal traffic flow and maintain stable application delivery.
Topic 5	BIG IP Administration Control Plane Administration: This section of the exam measures skills of System Administrators and covers managing the control plane where BIG IP is configured and administered. It includes working with user accounts, roles, device settings, configuration management, and using the graphical interface and command line for daily administrative tasks.

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F5 BIG-IP Administration Install, Initial Configuration, and Upgrade Sample Questions (Q27-Q32):

NEW QUESTION # 27
The BIG-IP Administrator uses Secure Copy Protocol (SCP) to upload a TMOS image to the
/shared/images/ directory in preparation for a TMOS upgrade.
After the upload is completed, what will the system do before the image is shown in the GUI under:
System » Software Management » Image List?

A. The system copies the image to /var/local/images/
B. The system performs a reboot into a new partition
C. The system verifies the internal checksum

Answer: C

Explanation:
When a TMOS image (.iso file) is uploaded into the /shared/images/ directory, the BIG-IP performs an internal validation step before the ISO appears in the GUI.
1. The system verifies the internal checksum
BIG-IP automatically reads the embedded checksum inside the ISO file
Verifies integrity of the uploaded image
Confirms the file is not corrupted or incomplete
Ensures the image is a valid F5 TMOS software image
Only after this checksum verification succeeds does the image appear under:
System -> Software Management -> Image List

NEW QUESTION # 28
Which command will display the current active volume on a BIG-IP system?

A. tmsh list sys software update
B. tmsh show sys software status
C. tmsh show sys version

Answer: B

Explanation:
To identify which boot volume is currently active on a BIG-IP system, the correct command is:
tmsh show sys software status
This command displays:
All installed boot volumes (HD1.1, HD1.2, HD1.3, etc.)
The BIG-IP software version installed on each volume
The Active field, indicating which volume the system is currently booted from The installation status ("complete", "in-progress", "allowed") This is the standard and authoritative way to determine the active boot location.

NEW QUESTION # 29
A BIG-IP device will be dedicated to functioning as a WAF, requiring only the ASM module to be provisioned.
What provisioning level will ensure that the system allocates all CPU, memory, and disk resources to this module exclusively?

A. Nominal
B. Dedicated
C. Maximal
D. Comprehensive

Answer: B

Explanation:
Provisioning defines how BIG-IP allocates system resources to modules.
The provisioning levels include:
* Dedicated - allocates all CPU, memory, and disk resources to a single module
* Nominal - standard resource allocation balanced with other modules
* Minimal - lowest level, used for basic utility needs
* None - module disabled
* Comprehensive / Maximal - not valid TMOS provisioning levels
Why "Dedicated" is correct
When a BIG-IP device is intended to run only ASM (Web Application Firewall), the recommended way to maximize performance is to provision the module at Dedicated level.
With ASM: Dedicated :
* ASM receives the entire hardware capacity
* No other modules can or should be provisioned
* This is explicitly recommended when a device is used solely as a WAF platform Why other options are incorrect B). Comprehensive / C. Maximal
* These are not valid provisioning modes in BIG-IP.
* TMOS supports: Nominal, Minimal, Large (module-specific), and Dedicated.
D). Nominal
* Shares resources with other modules
* Does not provide full system performance
* Not suitable when exclusive resource allocation is required
Thus, Dedicated is the correct provisioning choice.

NEW QUESTION # 30
The monitoring team reports that the SNMP server is unable to poll data from a BIG-IP device.

What information will help the BIG-IP Administrator determine whether the issue originates from the BIG-IP system?

A. The "VLAN / Tunnel" setting must allow All Vlans.
B. The configuration on the exhibit is correct and other options should be explored.
C. The "Traffic Group" setting must use a floating Traffic Group.
D. The "Port Lockdown" setting is preventing the SNMP server from polling data from the BIG-IP.

Answer: D

Explanation:
The exhibit shows a Self IP with:
VLAN: Data
Port Lockdown: Allow None
Impact of "Allow None" on SNMP
When a Self IP is configured with:
Port Lockdown: Allow None
the BIG-IP blocks all services and ports except a few hardcoded HA communication ports.
This means:
UDP/161 (SNMP) is blocked
UDP/162 (SNMP traps) is blocked
The SNMP server cannot poll or receive data from the BIG-IP through this Self IP SNMP relies on access through the Self IP if out-of-band (mgmt interface) is not used.
Thus, the issue is directly caused by Port Lockdown = Allow None, which prevents SNMP communication.

NEW QUESTION # 31
The Service Check Date on the license matches the date that the BIG-IP was installed two years ago. Which of the following activities would require the BIG-IP Administrator to renew the license and update the Service Check Date for it to work?

A. Uploading and installing new ASM signatures and threat campaigns to the device.
B. Performing a system software upgrade to a new version of BIG-IP that was just released.
C. Creating a QkView and uploading it to the F5 iHealth site for support to review.

Answer: B

Explanation:
The Service Check Date embedded in the BIG-IP license acts as a gating mechanism that determines eligibility for software updates. F5 enforces that the Service Check Date must be equal to or newer than the software release date of any BIG-IP version being installed. If the installed license carries a Service Check Date from two years ago, attempting to upgrade to a newly released BIG-IP software version -- whose release date post-dates that Service Check Date -- will fail, as the system validates this date during the upgrade process.

NEW QUESTION # 32
......

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