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F5 F5CAB1 Exam Overview:

Certification Vendor:	F5
Exam Name:	BIG-IP Administration Install, Initial Configuration, and Upgrade
Exam Number:	F5CAB1
Certificate Validity Period:	2 years
Exam Format:	Scenario-based, Multiple-choice
Exam Price:	USD 50 (Online), USD 65 (Test Center)
Passing Score:	245
Available Languages:	English
Exam Duration:	30 minutes
Real Exam Qty:	30
Related Certifications:	F5CAB5 BIG-IP Administration Support and Troubleshooting F5CAB2 BIG-IP Administration Data Plane Concepts F5CAB3 BIG-IP Administration Data Plane Configuration F5CAB4 BIG-IP Administration Control Plane Administration
Recommended Training:	F5 BIG-IP Administration Training F5 Certified Administrator Study Guide
Exam Registration:	F5 Education Services Pearson VUE Certiverse
Sample Questions:	F5 F5CAB1 Sample Questions
Exam Way:	Online proctored via Certiverse; In-person at Pearson VUE test centers
Pre Condition:	No mandatory prerequisites; basic IT knowledge and familiarity with BIG-IP systems recommended
Official Syllabus URL:	https://education.f5.com/exams/administration-install-initial-configuration-and-upgrade

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F5 F5CAB1 Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	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.
Topic 3	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 4	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 5	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.

F5 BIG-IP Administration Install, Initial Configuration, and Upgrade Sample Questions (Q51-Q56):

NEW QUESTION # 51
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?

A. Update the standby node first and reboot it to the newly updated boot location, failover to the newly updated node and verify functionality. Repeat the upgrade procedures on the next node, which is now in standby mode.
B. Update both nodes in the HA pair, then reboot both nodes simultaneously to ensure they run the same software version.
C. Update the active node first, reboot to the newly updated boot location and verify functionality, then push the update from the active to the standby node and reboot the standby node.
D. Reset the Device Trust, apply the update to each node separately, reboot both nodes, then re-establish the Device Trust.

Answer: A

Explanation:
For BIG-IP high-availability (HA) pairs, F5's recommended upgrade workflow prioritizes service continuity
, predictable failover , and minimal 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
Option C exactly matches F5's documented production-safe upgrade method:
* Upgrade the standby node 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 cause total outage , because both HA members would be unavailable at the same time.

NEW QUESTION # 52
The BIG-IP Administrator needs to update access to the Configuration Utility to include the172.28.31.0/24and
172.28.65.0/24networks.
From the TMOS Shell (tmsh), which command should the BIG-IP Administrator use to complete this task?

A. modify /sys httpd permit add { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 }
B. modify /sys httpd allow add { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 }
C. modify /sys httpd allow add { 172.28.31.0 172.28.65.0 }

Answer: B

Explanation:
Access to the BIG-IP Configuration Utility (TMUI) is controlled through the/sys httpd allowlist.
This list defines which IP addresses or subnets are allowed to connect to the management web interface.
To allow two new subnets-172.28.31.0/24and172.28.65.0/24-the administrator mustaddboth subnets to the existing list without removing current entries.
In tmsh, subnet entries must be specified innetwork/netmask format, for example:
172.28.31.0/255.255.255.0
The correct tmsh command to append these networks is:
modify /sys httpd allow add { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 } Why the other options are incorrect:
Option B:
* IPs are listed without masks, which is invalid for subnet-based access control.
* The system requiresnetwork/netmaskformat.
Option C:
* The command uses permit instead of allow, which is not a valid attribute of /sys httpd.
* The correct keyword must beallow.
Thus, onlyOption Acorrectly adds both permitted subnets in the proper tmsh format.

NEW QUESTION # 53
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 "Port Lockdown" setting is preventing the SNMP server from polling data from the BIG-IP.
B. The "VLAN / Tunnel" setting must allow All Vlans.
C. The configuration on the exhibit is correct and other options should be explored.
D. The "Traffic Group" setting must use a floating Traffic Group.

Answer: A

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 # 54
What should you do before performing a software upgrade on BIG-IP?

A. Delete unused routes
B. Make a backup of the configuration
C. Deactivate all SSL certificates
D. Shut down all virtual servers

Answer: B

Explanation:
It's crucial to back up the system configuration before upgrading to ensure you can restore the system if the upgrade fails.

NEW QUESTION # 55
An organization is planning to upgrade a BIG-IP system from 16.1.x to 17.1.x.
For a successful upgrade, the Service Check Date must be equal to or newer than the License Check Date required for 17.1.x.
Which command will show the Service Check Date on the BIG-IP system being upgraded?

A. grep "Service check date" /config/svc_chk_date.dat
B. grep "Service check date" /config/bigip.license
C. grep "Service check date" /config/bigip.conf
D. grep "Service check date" /config/BigDB.dat

Answer: B

Explanation:
BIG-IP licensing information, including the Service Check Date, is stored in the file:
/config/bigip.license
This file contains all license attributes downloaded from the F5 licensing server, including:
License key
Licensed modules
Useful life date
Service check date
The Service Check Date determines whether the system is eligible for upgrades to specific TMOS versions. When reviewing upgrade readiness, administrators extract this value directly from the license file with:
grep "Service check date" /config/bigip.license

NEW QUESTION # 56
......

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