GET Real F5 F5CAB1 Exam Questions With 100% Refund Guarantee Aug 17, 2026
Get Special Discount Offer on F5CAB1 Dumps PDF
F5 F5CAB1 Exam Syllabus Topics:
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
NEW QUESTION # 25
What should you do before performing a software upgrade on BIG-IP?
- A. Make a backup of the configuration
- B. Shut down all virtual servers
- C. Deactivate all SSL certificates
- D. Delete unused routes
Answer: A
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 # 26
When logged into the bash shell of a BIG-IP system, which of the following commands will display the management-ip address? (Choose two.)
- A. show mgmt ip
- B. list / sys management-ip
- C. ifconfig mgmt
- D. tmsh list /sys management-ip
Answer: C,D
Explanation:
When logged into the bash shell of a BIG-IP system, there are two valid ways to view the management-ip address:
A). tmsh list /sys management-ip
Even from the bash shell, the administrator can enter a tmsh command by typing:
tmsh list /sys management-ip
This displays:
Management IP address
Netmask
Any configured management routes
This is the official tmsh method for viewing the management-ip configuration.
C). ifconfig mgmt
In the underlying Linux OS, the management interface maps to the mgmt interface.
Running:
ifconfig mgmt
displays:
Assigned management IP
Netmask
Link-level status
This is a valid Linux-level method used frequently for troubleshooting.
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 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?
- A. The system copies the image to /var/local/images/
- B. The system performs a reboot into the new partition
- C. The system verifies the internal checksum
Answer: C
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."
NEW QUESTION # 28
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/BigDB.dat
- B. grep "Service check date" /config/bigip.conf
- C. grep "Service check date" /config/bigip.license
- D. grep "Service check date" /config/svc_chk_date.dat
Answer: C
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
Why the other options are incorrect:
/config/bigip.conf stores BIG-IP configuration objects, not license metadata.
/config/svc_chk_date.dat is not a valid file in the licensing system; it does not contain license parameters.
/config/BigDB.dat stores internal database values, not licensing attributes.
Thus, only the bigip.license file contains the correct licensing information required for verifying upgrade eligibility.
NEW QUESTION # 29
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 dobeforethe image appears 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 the new partition
- C. The system verifies the internal checksum
Answer: C
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 systemverifies the internal checksumembedded 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 isnotused for ISO storage.
* All valid images remain in/shared/images/.
Thus, the correct system action ischecksum verification.
NEW QUESTION # 30
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 performs a reboot into a new partition
- B. The system copies the image to /var/local/images/
- 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
Why the other options are incorrect:
A). The system performs a reboot into a new partition
* Uploading an ISO file never triggers a reboot.
C). The system copies the image to /var/local/images/
* All valid TMOS images remain in /shared/images/ .
* No copying occurs.
NEW QUESTION # 31
Given thatBIGIP-<version>.isoandHotfix-BIGIP-<version>-ENG.isohave been uploaded to/shared/images on an F5 device, what is the appropriatetmshcommand to prepare and update the BIG-IP device with the hotfixof a software version on anew volume HD1.2?
(Choose one.)
- A. tmsh copy /sys software hotfix Hotfix-BIGIP-<version>-ENG.iso volume HD1.2
- B. tmsh install /sys software hotfix Hotfix-BIGIP-<version>-ENG.iso create-volume HD1.2
- C. tmsh install /sys software BIGIP-<version>.iso hotfix Hotfix-BIGIP-<version>-ENG.iso create-volume HD1.2
- D. tmsh create /sys software hotfix Hotfix-BIGIP-<version>-ENG.iso volume HD1.2
Answer: C
Explanation:
When installing a BIG-IP software versionwith a HotFixon anew boot volume, F5 requires that both thebase TMOS imageand theHotFix imagebe installed together as part of the same installation workflow.
The correct process is:
* Specify thebase TMOS ISO
* Specify theHotFix ISOthat corresponds to that base version
* Instruct the system tocreate a new boot volume
* Install both images into that new volume
This is achieved with the following tmsh syntax:
tmsh install /sys software BIGIP-<version>.iso hotfix Hotfix-BIGIP-<version>-ENG.iso create-volume HD1.2 This command:
* Installs the base image first
* Applies the HotFix on top of the base image
* Creates and installs everything onHD1.2
* Leaves the currently active volume untouched for rollback
Why the other options are incorrect
A). Installing only the hotfix
A HotFix cannot be installed by itself on a new volume. A base image must already be present.
C). Using create instead of install
The create keyword is not valid for software installation operations.
D). Using copy
The copy command does not install software images or hotfixes.
NEW QUESTION # 32
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 dobeforethe image is shown in the GUI under:
System - Software Management - Image List?
- A. The system performs a reboot into a new partition
- B. The system copies the image to /var/local/images/
- 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
Why the other options are incorrect:
A). The system performs a reboot into a new partition
* Uploading an ISO file never triggers a reboot.
C). The system copies the image to /var/local/images/
* All valid TMOS images remain in/shared/images/.
* No copying occurs.
NEW QUESTION # 33
When is theLicense Service Check Dateenforced on a BIG-IP system?
- A. During a software install
- B. After editing a virtual server
- C. During system startup
Answer: A
Explanation:
TheService Check Datedetermines whether a particular software version is allowed to run under the device's license.
* When installing or upgrading TMOS, the installer checks theService Check Datestored in the BIG-IP license file.
* If the license date isolderthan the minimum required for the target version, the software installation is blocked.
* This check happensspecifically during a software install, not during routine device operations.
Editing virtual servers or system startup do not trigger this validation.
Thus, the enforcement happensduring software installation.
NEW QUESTION # 34
Which command-line tool is used to perform most administrative tasks on F5 BIG-IP?
- A. CLI
- B. SSH
- C. Bash
- D. TMSH
Answer: D
Explanation:
tmsh (Traffic Management Shell) is the command-line interface used for managing and configuring the F5 BIG-IP system.
NEW QUESTION # 35
Which of the following actions is NOT required during the initial setup of a BIG-IP system?
- A. Set up SSL certificates
- B. Install a software license
- C. Assign an administrative password
- D. Set up self-IPs
Answer: A
Explanation:
Setting up SSL certificates is typically done after the initial setup, not during it. The main tasks during initial setup involve network configuration and licensing.
NEW QUESTION # 36
When using the tmsh shell of a BIG-IP system, which command will display the management-ip address?
- A. show /sys management-ip
- B. run /util bash ifconfig mgmt
- C. list /sys management-ip
Answer: C
Explanation:
Within the BIG-IP Traffic Management Shell (tmsh), system configuration objects--including the management IP--are organized under the /sys hierarchy. The management IP address is a configurable property stored in the system configuration and can be viewed using the tmsh list command, which displays configuration objects and their currently assigned values.
Why "list /sys management-ip" is correct
The list command in tmsh is used to display configured system values, not runtime statistics.
The object that holds the management IP settings on BIG-IP systems is located at:
/sys management-ip
Running the command:
list /sys management-ip
will reveal the settings for the management IP interface, including the address, netmask, and any associated attributes.
This is the standard method used during system setup and verification to confirm the management IP configuration.
This behavior aligns with BIG-IP administration procedures, where configuration information is retrieved using list, while operational data is retrieved using show.
NEW QUESTION # 37
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.)
- A. The Self-IP port lockdown behavior could be adjusted to Allow Management
- B. The Self-IP port lockdown behavior could be adjusted to Allow All
- C. The Self-IP port lockdown behavior could be adjusted to Allow Mgmt
- D. The Self-IP port lockdown behavior could be adjusted to Allow Default
Answer: A,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 # 38
The device is currently onv15.1.2.1.
The BIG-IP Administrator needs to boot the device back tov13.1.0.6to gather data for troubleshooting.
The system shows:
Sys::Software Status
Volume Product Version Build Active Status Allowed
HD1.1 BIG-IP 15.1.2.1 0.0.10 yes complete yes
HD1.2 BIG-IP 13.1.0.6 0.0.3 no complete yes
Which is the correct command-line sequence to boot the device to version13.1.0.6?
- A. Use tmsh to select a new boot volume, tmsh reboot HD1.2
- B. switchboot -b HD1.2, then reboot
- C. Use tmsh to select a new boot volume, tmsh switchboot HD1.2
- D. switchboot -I HD1.2, then reboot
Answer: B
Explanation:
To change the boot volume on a BIG-IP system from one installed TMOS version to another, the correct CLI tool is:
switchboot
The correct syntax uses the-bflag:
switchboot -b <volume>
This command marks the specified boot location as the one to be used on the next reboot.
Thus, to boot intoHD1.2which contains13.1.0.6, the sequence is:
* Mark HD1.2 as the next boot location:
* switchboot -b HD1.2
* Reboot the system:
* reboot
This is the standard and officially supported method for selecting a different installed volume.
Why the other options are incorrect:
A). "tmsh reboot HD1.2"
* There is no such tmsh syntax.
* Boot volume cannot be selected by adding a parameter to reboot.
C). switchboot -I HD1.2
* The -I flag is invalid. Only -b is used.
D). "tmsh switchboot HD1.2"
* switchboot isnota tmsh command; it is a system-level shell utility.
Therefore,Option Bis the correct and valid command sequence.
NEW QUESTION # 39
A new logging solution is being implemented on the network. Policy requires keeping management traffic sent from the BIG-IPout of the management interface. After configuring the BIG-IP to forward messages to the new Syslog server, the BIG-IP Administrator notices that packets are being sentfrom a numbered data- plane Self IP.
What should the BIG-IP Administrator change to send the traffic out of thecorrect interface?
- A. Modify the port lockdown settings on the Self IP address to allow UDP port 514 traffic.
- B. Create a new Self IP in the same subnet as the management IP address using a route domain.
- C. Set the Management IP as the source address when configuring a Remote Syslog destination.
- D. Create a Management Route for the specific address/subnet of the syslog service via TMSH.
Answer: D
Explanation:
By default,management-plane trafficuses themanagement routing table, whiledata-plane trafficuses the TMM routing table.
Remote Syslog traffic ismanagement-planetrafficunlessa management route exists.
If noManagement Routematches the Syslog server's destination IP, the BIG-IP will instead:
* UseTMM routes, and
* Source the packets from aSelf IP
This is exactly what the administrator is observing.
To force Syslog traffic out the management port:
You must create aManagement Route, which is configured using:
tmsh create /sys management-route <name> gateway <ip> network <syslog subnet> This sends syslog traffic:
* Out of themanagement interface
* Using theManagement IPas the source
Thus,Option Bis correct.
Why the other options are incorrect:
A). Set the Management IP as the source address
* Source address selection is overridden by routing.
* Without a management route, traffic still goes out the data plane.
C). Create a new Self IP using a route domain
* Unnecessary and not related to management-plane routing.
* Syslog traffic should not rely on data-plane Self IPs.
D). Modify port lockdown on Self IP to allow UDP/514
* This would allow Syslog trafficintothe BIG-IP over a Self IP, not forceoutboundtraffic via management.
NEW QUESTION # 40
What command will allow the BIG-IP Administrator to view theconfigured management IPof a BIG-IP system?
(Choose one.)
- A. tmsh list sys management-ip
- B. tmsh show sys management-ip
- C. tmsh list sys management-route
- D. tmsh list net self
Answer: A
Explanation:
Comprehensive and Detailed Explanation (Paraphrased)
The BIG-IP stores the configured management IP address as asystem configuration objectunder the/sys hierarchy.
To display configured (persistent) values, BIG-IP uses thetmsh list command, not show.
Why tmsh list sys management-ip is correct
* The management IP configuration is defined under:
* /sys management-ip
* Running:
* tmsh list sys management-ip
displays:
* The configured management IP address
* Netmask
* Associated attributes
This command shows theactual configured management IP, which is what the question asks for.
Why the other options are incorrect
A). tmsh show sys management-ip
* The show command is used for runtime statistics and status.
* management-ip is a configuration object, not a statistics object.
C). tmsh list sys management-route
* Displays management routing information, not the management IP address itself.
D). tmsh list net self
* Displays Self IPs used on the data plane.
* Does not show the management interface IP.
NEW QUESTION # 41
What happens after upgrading the BIG-IP system?
- A. The system enters a maintenance mode
- B. The system automatically restarts and applies the new version
- C. The configuration must be reapplied manually
- D. The system continues to run the previous version until manually restarted
Answer: B
Explanation:
After a successful upgrade, the system automatically restarts and applies the newly uploaded software version.
NEW QUESTION # 42
In order to configure allowed IP addresses forSSH accessto a BIG-IP device, the BIG-IP Administrator has issued the commands shown in the exhibit.
Which IP addresses will have SSH access after issuing the shown commands?
(Choose two.)
- A. 10.0.0.254
- B. 10.0.0.256
- C. 10.0.0.100
- D. 100.0.1.10
- E. 100.0.0.10
Answer: A,C
Explanation:
From the exhibit, the administrator performs the following actions:
* Displays the current SSH allow configuration:
tmsh list sys sshd allow
allow { ALL }
* Replaces the existing SSH allow list with a specific subnet:
tmsh modify sys sshd allow replace-all-with { 10.0.0.0/24 }
* Confirms the updated configuration:
tmsh list sys sshd allow
allow { 10.0.0.0/24 }
This configuration restricts SSH access to only hosts that fall within the10.0.0.0/24network.
Evaluation of the options
A). 10.0.0.100
This address is within the 10.0.0.0/24 subnet and is a valid host address, so SSH access is permitted.
B). 10.0.0.254
This address is also within the 10.0.0.0/24 subnet and is a valid host address, so SSH access is permitted.
C). 10.0.0.256
This is not a valid IP address because an IPv4 octet cannot exceed 255.
D). 100.0.1.10
This address is outside the configured 10.0.0.0/24 subnet and will not be allowed.
E). 100.0.0.10
This address is also outside the configured subnet and will not be allowed.
NEW QUESTION # 43
Which two items demonstrate thecreation of a new volumefor software images?
(Choose two.)
- A. tmsh install /sys software image BIGIP-<version>.iso volume HD1.5 create-volume
- B. tmsh install software image /shared/images/BIGIP-<version>.iso volume HD1.5 create-volume
- C. Using the GUI, go toSystem > Software Management > Available Images > Install, and in the Install Software Image pop-up window, type the new volume name or number and clickInstall.
- D. tmsh install sys software image /shared/images/BIGIP-<version>.iso volume HD1.5 create-volume
- E. Using the GUI, go toSystem > Disk Management, selectNew Volume. In the pop-up window, type the name or number of the new volume and clickApply.
Answer: B,E
Explanation:
In BIG-IP, software images are installed onboot volumes(for example, HD1.1, HD1.2, HD1.3, etc.).
To install software on anew volume, the administrator must instruct the system to create a new boot location before installation.
There are two correct ways to create a new volume:
A). tmsh command (with correct syntax)
tmsh install software image /shared/images/BIGIP-<version>.iso volume HD1.5 create-volume This syntax correctly includes:
* install software image
* full path to ISO (/shared/images/...)
* volume name (HD1.5)
* create-volumekeyword
This instructs BIG-IP to create the new boot volume as part of the installation.
C). Using the GUI # System > Disk Management
From the Disk Management menu, the administrator can:
* Select "New Volume"
* Enter the volume identifier (e.g., HD1.5)
* Apply changes
This GUI method is officially supported and explicitly creates a new boot volume before installing the software.
Why the other options are incorrect:
B). Incorrect tmsh syntax
* Missing /shared/images/ path
* Incorrect command structure
D). Incorrect command structure
* Missing required keywords and correct command hierarchy
E). Software Management # Install does NOT create volumes
* This installs to anexistingvolume only
* The GUI install dialog does not create new boot volumes
Thus, onlyOption AandOption Cproperly create a new software volume.
NEW QUESTION # 44
An F5 VE has been deployed into a VMware environment via an OVF file.
An administrator wants to configure the management IP address so the VE can be accessed for further setup.
Which two are valid methods for configuring the management-ip address? (Choose two.)
- A. Log into the remote console and configure the management IP by running the setup command.
- B. Log into the remote console and configure the management IP through TMSH using:
create ltm management-ip <ip address>/<mask> - C. Log into the remote console and configure the management IP through TMSH using:
create sys management-ip <ip address>/<mask> - D. Log into the remote console and configure the management IP by running the config executable.
Answer: C,D
Explanation:
A newly deployed BIG-IP Virtual Edition (VE) in VMware requires initial configuration of its management-ip address so it can be accessed over the network. F5 provides several valid mechanisms during initial console access:
A). Running the config utility
The config script is available on new BIG-IP installations and VE deployments.
It launches a guided text-based wizard allowing configuration of:
Management IP
Netmask
Default route
This is a standard and recommended method during first-time setup.
B). Using TMSH with create sys management-ip
Administrators can enter TMSH directly from the console and run:
create sys management-ip <ip>/<mask>
The management-ip object resides under sys, not under ltm or any other module.
This is the correct tmsh method for defining the management interface address.
NEW QUESTION # 45
What is the primary function of the Traffic Management Operating System (TMOS) in F5 BIG-IP?
- A. It encrypts data between servers
- B. It allows for traffic routing between the Internet and data center
- C. It provides the hardware resources for the system
- D. It is responsible for system management and operations
Answer: D
Explanation:
TMOS is the core operating system that powers F5 BIG-IP, managing traffic, security, and system functions.
NEW QUESTION # 46
......
PDF Download F5 Test To Gain Brilliante Result!: https://www.actualtorrent.com/F5CAB1-questions-answers.html
Provide Updated F5 F5CAB1 Dumps as Practice Test and PDF: https://drive.google.com/open?id=1BuElrVKkvHj9R-owr34kdNBDlTXfPvXv