2026 Realistic Verified F5CAB1 exam dumps Q&As - F5CAB1 Free Update
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NEW QUESTION # 19
Which of the following areresource allocation (provisioning) settingsfor BIG-IP modules?
(Choose two.)
- A. Dedicated
- B. Maximum
- C. Nominal
- D. Limited
Answer: A,C
Explanation:
BIG-IP module provisioning determines howCPU, memory, and disk resourcesare allocated to each licensed module. F5 defines a specific set of supported provisioning levels.
Valid provisioning (resource allocation) settings
Nominal
* Allocates a standard, balanced amount of system resources to a module.
* Intended for typical production deployments where multiple modules may be provisioned at the same time.
Dedicated
* Allocatesall available system resourcesto a single module.
* Used when the BIG-IP device is dedicated to running only one module (for example, ASM-only or APM-only deployments).
* No other modules can be provisioned when one is set to Dedicated.
These two options are valid and supported provisioning levels.
Why the other options are incorrect
Maximum
* This is not a valid BIG-IP provisioning level.
* BIG-IP does not use "Maximum" as a resource allocation setting.
Limited
* This is also not a supported provisioning level.
* BIG-IP uses levels such as None, Minimal, Nominal, and Dedicated (module-dependent), not Limited.
NEW QUESTION # 20
How can the BIG-IP Administrator tell when anunlicensed modulehas been provisioned?
- A. When provisioning an unlicensed module, a warning will appear.
- B. AProvisioning Warningwill be displayed in the GUI in the upper left corner.
- C. A BIG-IP does not allow unlicensed modules to be provisioned.
Answer: B
Explanation:
The BIG-IP system has built-in licensing enforcement.
If an administrator provisions a module that the device isnot licensedto run, the system will still allow the provisioning action to occurinitially, but the system detects the mismatch and displays an alert.
What actually happens:
* The GUI places awarning bannerin theupper-left cornerlabeled something similar to:"Provisioning Warning"
* This appears immediately after provisioning a module that is not included in the active license.
* The system remains in an "inconsistent state" until the module is disabled again or the license is updated.
This is the visual cue BIG-IP uses to indicate that a module was provisioned without valid licensing.
Why the other options are incorrect:
A). "A BIG-IP does not allow unlicensed modules to be provisioned."
* Not true. BIG-IPdoesallow provisioning, but warns afterward.
B). "A warning will appear when provisioning an unlicensed module."
* The warning doesnotappear during the provisioning step itself.
* It appearsafter provisioning, in the main GUI, as a system banner.
NEW QUESTION # 21
When is theLicense Service Check Dateenforced on a BIG-IP system?
- A. During system startup
- B. After editing a virtual server
- C. During a software install
Answer: C
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 # 22
Which command will display thecurrent active volumeon 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
* TheActivefield, indicating which volume the system is currently booted from
* The installation status ("complete", "in-progress", "allowed")
This is thestandard and authoritativeway to determine the active boot location.
Why the other options are incorrect:
A). tmsh show sys version
* Displays OS version, build, and date.
* Doesnotshow boot locations or which volume is active.
C). tmsh list sys software update
* Shows software update configurations, not boot volume status.
* Does not display which volume is active.
NEW QUESTION # 23
For security reasons, a BIG-IP Administrator needs to specify allowable IP ranges for access to the Configuration Utility (WebUI).
The exhibit shows the User Administration section of the Configuration Utility.
The administrator could not find any setting that explicitly restricts access to the Configuration Utility.
Which one of the following is a reason for that?
- A. Restricting access to the Configuration Utility can only be done from the Command Line Interface
- B. To avoid locking out the administrator, recent versions of BIG-IP no longer allow restricting administrator access to the Configuration Utility by source IP address
- C. The administrator must restrict access by IP address for SSH, which will implicitly restrict access to the Configuration Utility
- D. The administrator needs to switch to the "Advanced" view mode in order to display the relevant setting
Answer: A
Explanation:
The screenshot shown is from theUser Administrationsection of the BIG-IP GUI.
This section controls:
* Root and Admin passwords
* SSH Access
* SSH IP Allow settings
However,it does not contain any controls for restricting access to the WebUI (TMUI).
BIG-IP does not provide TMUI access restrictions from this part of the GUI.
Access to the web-based Configuration Utility is controlled by thehttpd allow list, configured through TMSH:
tmsh modify /sys httpd allow { <IP/subnet> }
This setting is not displayed in the User Administration panel, and in many BIG-IP versions, the httpd allow list isonly configurable from the CLI, not the GUI.
Therefore, the administrator cannot find the setting in the screen shown because:
* TMUI access restriction isnotlocated in this GUI section
* It must be configured usingtmshunder/sys httpd allow
This is whyOption Ais correct.
NEW QUESTION # 24
A BIG-IP Administrator is using Secure Copy Protocol (SCP) to transfer a TMOS image to the BIG-IP system in preparation for an upgrade.
To what directory should the file be transferred?
- A. /local/images/
- B. /var/images/
- C. /shared/images/
Answer: C
Explanation:
BIG-IP systems require all ISO images (base TMOS images and HotFix images) to be stored in a specific directory used for software installation:
/shared/images/
This directory:
* Is theonly supported locationfrom which the BIG-IP software installation system validates and installs ISO files
* Is accessible by both the GUI and TMSH installers
* Has adequate storage space allocated specifically for images
* Is part of the shared partition that persists across reboots
When transferring images via SCP, the administrator must copy them directly into/shared/images/so that:
* The GUI (System # Software Management # Available Images) can detect the image
* TMSH install software image commands can reference it
Other directories such as/local/images/or/var/images/are not valid storage paths for software images.
NEW QUESTION # 25
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 # 26
A BIG-IP Administrator needs to install a HotFix on a standalone BIG-IP device, which hasHD1.1as the Active Boot Location.
The administrator has already re-activated the license and created a UCS archive.
In which sequence should the administrator perform the remaining steps?
- A. Install HotFix in HD1.2, Install base Image in HD1.2, Activate HD1.2
- B. Activate HD1.2, Install base Image in HD1.2, Install HotFix in HD1.2
- C. Install base Image in HD1.2, Install HotFix in HD1.2, Activate HD1.2
- D. Install HotFix in HD1.1, Reboot the BIG-IP device, Install UCS Archive
Answer: C
Explanation:
When installing a HotFix on a BIG-IP device, F5 best practices require:
* Installing the base TMOS image on a new, unused boot volume (HD1.2)
* This ensures the upgrade happens on a clean volume.
* The existing active boot location remains untouched for rollback.
* Installing the HotFix onto the SAME new boot volume (HD1.2)
* HotFixes must be applied on top of a base version.
* They cannot be installed on an empty volume.
* They must match the base image version.
* Activating the new boot volume (HD1.2)
* The system reboots into the updated software stack.
* Activation happensafterbase + HotFix installation is complete.
This sequence is exactly shown inOption C:
Install base Image in HD1.2
Install HotFix in HD1.2
Activate HD1.2
Why the other options are incorrect:
A). Install HotFix before base image
* Impossible.
* HotFix requires an installed base version first.
B). Installing HotFix on HD1.1 (active boot volume)
* Not recommended.
* Upgrading in-place removes rollback safety.
* HotFix cannot be applied cleanly without applying base image first.
D). Activate HD1.2 before installing anything
* You cannot activate an empty boot volume.
* Activation only occurs after the base + HotFix software is installed.
NEW QUESTION # 27
The Port Lockdown feature prevents unwanted connection attempts to a Self IP.
Which three types of connection attempts areunaffectedby Port Lockdown settings?
- A. Centralized Management Infrastructure (CMI), Secure Shell (SSH), Internet Control Message Protocol (ICMP)
- B. Defined virtual server traffic, Secure Shell (SSH), Centralized Management Infrastructure (CMI)
- C. Defined virtual server traffic, Internet Control Message Protocol (ICMP), Centralized Management Infrastructure (CMI)
Answer: C
Explanation:
Port Lockdown controls which ports and protocols aSelf IPwill respond to.
However, certain traffic types bypass Port Lockdown for BIG-IP functionality and routing integrity.
The three types that areNOT affectedby Port Lockdown are:
1. Defined Virtual Server Traffic
Traffic destined to a Self IP that matches aconfigured virtual serveris always accepted by the BIG-IP, regardless of Port Lockdown settings.
This ensures that traffic processing does not break when administrators restrict Self-IP ports.
2. ICMP (Internet Control Message Protocol)
ICMP (such as ping, traceroute responses, etc.) always passes through a Self IP even when Port Lockdown is set to:
* Allow Default
* Allow None
* Allow Custom
F5 allows ICMP for reachability and diagnostic purposes independent of Port Lockdown rules.
3. Centralized Management Infrastructure (CMI)
CMI includes the internal HA services used for:
* Device Trust
* ConfigSync
* Failover
* Mirroring
These essential HA communications bypass Port Lockdown to prevent accidental cluster failure.
The well-known port for this traffic isTCP 4353, which is always permitted.
Why the other options are incorrect:
Option A:SSHisrestricted by Port Lockdown unless explicitly allowed.
Option B:Same issue - SSH does not bypass Port Lockdown.
OnlyDefined VS Traffic,ICMP, andCMIbypass Port Lockdown.
NEW QUESTION # 28
A BIG-IP Administrator needs to purchase new licenses for a BIG-IP appliance.
The administrator needs to know:
* Whether a module is licensed
* The memory requirement for that module
Where should the administrator view this information in theSystem menu?
- A. Configuration - OVSDB
- B. Resource Provisioning
- C. Configuration - Device
- D. Software Management
Answer: B
NEW QUESTION # 29
An administrator is in the process of reactivating the license using the interface displayed in the exhibit.
What is the address of the license server to which the BIG-IP device must be able to establish an outbound connection in order to use theAutomatic Activation Method?
- A. license.f5.com
- B. ask.f5.com
- C. callhome.f5.com
- D. activate.f5.com
Answer: D
Explanation:
When you chooseAutomaticas the activation method in the License , Re-activate screen, the BIG-IP device itself contacts F5'slicense activation serviceover the Internet.
For successful automatic activation:
* The BIG-IP must have outbound network connectivity (typically via the management interface).
* DNS resolution and routing must allow it to reach theF5 license activation host(the one shown in option D).
* The device sends its dossier and registration key to that service and receives an updated license file in return, which is then installed automatically.
The other hostnames in the options are not used by BIG-IP for license activation, so they cannot be correct in the context ofAutomatic Activation.
NEW QUESTION # 30
Refer to the exhibit.
What traffic will be permitted to reach the BIG-IP?
- A. SSH
- B. FTP
- C. Telnet
Answer: A
Explanation:
The exhibit shows the configuration of aSelf IPwith:
* Port Lockdown: Allow Custom
* ACustom Listthat includes the following TCP ports:
* 443
* 22
Meaning of these ports:
* TCP 443# HTTPS (TMUI - web-based management)
* TCP 22# SSH (command-line remote access)
No other TCP, UDP, or protocol entries are listed; therefore, only these two services are allowed to reach the BIG-IP via this Self IP.
Evaluating the answer choices:
Option
Service
Port
Allowed?
FTP
TCP 21
Not listed
#Not allowed
SSH
TCP 22
Listed
#Allowed
Telnet
TCP 23
Not listed
#Not allowed
Thus,SSHis the only traffic permitted through this Self IP configuration.
NEW QUESTION # 31
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. switchboot -I HD1.2, then reboot
- B. switchboot -b HD1.2, then reboot
- C. Use tmsh to select a new boot volume, tmsh switchboot HD1.2
- D. Use tmsh to select a new boot volume, tmsh reboot HD1.2
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 # 32
A BIG-IP Administrator discovers malicious brute-force attempts to access the BIG-IP device on the management interfacevia SSH.
The administrator needs to restrict SSH access to the management interface.
Where should this be accomplished?
- A. Network > Self IPs
- B. System > Configuration
- C. System > Platform
- D. Network > Interfaces
Answer: B
Explanation:
The BIG-IPmanagement interface (MGMT port)is controlled throughSystem settings, not through the Network menu.
SSH access on the management interface is configured here:
System # Configuration # Device # General # SSH Access / SSH IP Allow
This section allows the administrator to:
* Enable or disable SSH service
* Restrict SSH access to specific IP addresses or subnets
* Apply security policies to the management interface
Why the other options are incorrect:
A). Network > Interfaces
* Used for data-plane physical interface settings, not management plane SSH restrictions.
B). Network > Self IPs
* Controls in-band management or data-plane access, not the dedicated management port.
D). System > Platform
* Used for hostname, time zone, LCD contrast, hardware settings - not SSH security on the management port.
Therefore, restricting SSH access to themanagement interfacemust be done under:
#System # Configuration # Device # General
Which corresponds toOption C.
NEW QUESTION # 33
A BIG-IP Administrator needs to install aHotFixon a standalone BIG-IP device.
The device currently hasHD1.1as the Active Boot Location.
The administrator has already reactivated the license and created a UCS archive.
In which sequence should the administrator perform theremaining steps?
- A. Install HotFix in HD1.2, Install base Image in HD1.2, Activate HD1.2
- B. Activate HD1.2, Install base Image in HD1.2, Install HotFix in HD1.2
- C. Install base Image in HD1.2, Install HotFix in HD1.2, Activate HD1.2
- D. Install HotFix in HD1.1, Reboot the BIG-IP device, Install UCS Archive
Answer: C
Explanation:
When installing a software upgrade with a HotFix on BIG-IP, the correct workflow requires:
* Install the base TMOS imageon an unused boot volume
* Install the corresponding HotFixonto that same boot volume
* Activate the updated boot volumeto boot into the new software
This method ensures:
* The existing active system (HD1.1) is untouched
* The upgrade occurs in a new, clean volume (HD1.2)
* The HotFix applies properly to the same base image
* The administrator can revert to HD1.1 if issues occur
OptionCmatches the correct F5 upgrade sequence:
1. Install base image on HD1.2
2. Install HotFix on HD1.2
3. Activate HD1.2
Why the other options are incorrect:
A). Install HotFix before base image
* HotFixes must be appliedafterthe base image; not valid.
B). Installing a HotFix on the active boot location (HD1.1)
* Not recommended and does not use a clean new volume.
* Also does not involve installing the base image.
D). Activating HD1.2 before installing anything
* Cannot activate an empty or invalid boot volume.
Thus,Option Cis the correct sequence.
NEW QUESTION # 34
A BIG-IP Administrator needs to verify the state of equipment in the data center.
A BIG-IP appliance has asolid yellow indicatoron the status LED.
How should the administrator interpret this LED indicator?
- A. A warning-level alarm condition is present
- B. Appliance is a standby member in a device group
- C. A power supply is NOT operating properly
- D. Appliance is halted or in End-User Diagnostic (EUD) mode
Answer: A
Explanation:
BIG-IP hardware platforms use chassis LEDs to indicate system health states.
Asolid yellow status LEDtypically indicates awarning condition, such as:
* A non-critical hardware alert
* A temperature threshold nearing limit
* A minor fan or sensor irregularity
* Other non-fatal environmental or system conditions
This state reflects awarning-level alarm, meaning the unit is operational but requires investigation.
Why the other options are incorrect
A). Halted or EUD mode
* This is associated with different LED patterns (usually flashing conditions or specific color codes), not a solid yellow status LED.
B). Standby in device group
* HA state is not indicated by the chassis status LED.
* Standby status is alogicaldevice state, not a hardware LED state.
D). Power supply failure
* Power supply indicators use separate LEDs located on each power module (usually flashing amber/red), not the system status LED.
Thus, asolid yellow status indicatorsignifies awarning-level alarm.
NEW QUESTION # 35
For an upgrade of a standalone BIG-IP, a maintenance window is available in which brief interruptions are allowed.
Actions with no impact can be done outside the maintenance window.
When should a license reactivation be performed?
- A. After the maintenance window.
- B. Before the maintenance window.
- C. During the maintenance window.
Answer: B
Explanation:
License reactivation updates the BIG-IP device's license file to ensure:
* TheService Check Dateis current
* The device is eligible to install the intended TMOS version
* Any module entitlement updates are received
Reactivationdoes not interrupt trafficand does not require a reboot, making it safe to performbeforethe maintenance window.
F5 best practices state:
* Performall non-impact tasks priorto the scheduled maintenance window
* Leave the window available for activities that require rebooting, such as the software installation itself Since license reactivation isnon-disruptive, it should be donebeforethe upgrade window starts.
NEW QUESTION # 36
The Configuration Utility of a BIG-IP device is currently accessible via its management IP10.53.1.245from all VLANs.
The BIG-IP Administrator needs to restrict access so only hosts from the10.0.0.0/24subnet can access the Configuration Utility.
Which TMSH command accomplishes this?
- A. (tmos)# create /net acl MGMT.HTTP rule add { (permit tcp 10.0.0.0 0.0.0.255 host 10.53.1.245 http) }
- B. (tmos)# modify /sys httpd allow replace-all-with {10.0.0.0/24}
- C. (tmos)# modify /ltm httpd allow replace-all-with {10.0.0.0/24}
- D. (tmos)# create /net acl MGMT.HTTP rule add { (permit tcp 10.0.0.0/24 10.53.1.245 http) (deny ip any any http) }
Answer: B
Explanation:
BIG-IP controls access to the web-based Configuration Utility (TMUI) through the/sys httpd allowlist. This parameter specifies which client IPs or subnets may initiate HTTP/HTTPS connections to the management interface.
To restrict TMUI access toonlythe 10.0.0.0/24 subnet:
* The correct method is tomodify the HTTPD allow listso that it contains only this subnet.
* This requires replacing the entire current list with the new subnet using:
modify /sys httpd allow replace-all-with {10.0.0.0/24}
This ensures thatonlyclients within 10.0.0.0/24 can reach the Configuration Utility.
Why the other options are incorrect:
* Options A and Ccreate network ACL objects under /net acl, which apply to data-plane traffic, not management-plane TMUI access. TMUI access is not controlled by LTM ACLs but by the HTTPD allow directive.
* Option Bis incorrect syntax and references /ltm httpd, which is not the proper object; the correct hierarchy is /sys httpd.
Thus, only modifying the/sys httpd allowlist achieves the required restriction.
NEW QUESTION # 37
Refer to the exhibit.
An organization has purchased a BIG-IP license that includes all available modules but has chosen to provision only the modules they require.
The exhibit displays the current resource allocation from theSystem # Resource Provisioningpage.
Based on the information provided, which F5 modules have been provisioned?
- A. LTM, DNS, APM
- B. TMM, DNS, APS
- C. LTM, APM
- D. DNS, APM
Answer: A
Explanation:
The exhibit shows theCurrent Resource Allocationfor:
* CPU
* Disk
* Memory
In particular, theMemory Allocationbar displays the modules that are currently provisioned.
Memory is the most reliable indicator because BIG-IP allocates memoryonlyto modules that are actively provisioned.
From the exhibit:
* MGMT(Management) - always present
* TMM(Traffic Management Microkernel) - indicatesLTM is provisioned
* GTM- this label indicates that theDNS moduleis provisioned (GTM = Global Traffic Manager, now called DNS)
* APM- explicitly shown, indicatingAccess Policy Manageris provisioned
Therefore, the provisioned modules are:
* LTM(implied by TMM allocation)
* DNS/GTM
* APM
This matchesOption C: LTM, DNS, APM.
NEW QUESTION # 38
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 allow add { 172.28.31.0 172.28.65.0 }
- B. modify /sys httpd permit add { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 }
- C. modify /sys httpd allow add { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 }
Answer: C
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 # 39
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 # 40
The BIG-IP Administrator wants to manage the newly built F5 system through anin-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 viaSSHorHTTPS.
Whatport lockdownsettings 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 toAllow Mgmt
- B. The Self-IP port lockdown behavior could be adjusted toAllow All
- C. The Self-IP port lockdown behavior could be adjusted toAllow Management
- D. The Self-IP port lockdown behavior could be adjusted toAllow Default
Answer: A,C
Explanation:
Self-IPs include a security feature calledPort 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 donotexpose all services, reducing the attack surface.
Why the other options are incorrect:
A). Allow Default
* This allows only a minimal set of system-required ports (e.g., failover, config sync), not SSH or HTTPS.
* Administrator access would still fail.
B). Allow All
* Opens all ports on the Self-IP, which isnot secure.
* Exposes services that should remain restricted.
Therefore,Allow Mgmt / Allow Managementare the correct choices.
NEW QUESTION # 41
......
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