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F5 F5CAB1 Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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 2
  • 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 3
  • 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 4
  • 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 5
  • 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.

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F5 BIG-IP Administration Install, Initial Configuration, and Upgrade Sample Questions (Q11-Q16):

NEW QUESTION # 11
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?

Answer: D

Explanation:
The screenshot shown is from the User Administration section 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 the httpd 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 is only configurable from the CLI, not the GUI.
Therefore, the administrator cannot find the setting in the screen shown because:
TMUI access restriction is not located in this GUI section
It must be configured using tmsh under /sys httpd allow
This is why Option A is correct.


NEW QUESTION # 12
In order to configure allowed IP addresses for SSH access to 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.)

Answer: A,E

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 the 10.0.0.0/24 network.
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 # 13
Given that BIGIP-<version>.iso and Hotfix-BIGIP-<version>-ENG.iso have been uploaded to
/shared/images on an F5 device, what is the appropriate tmsh command to prepare and update the BIG-IP device with the hotfix of a software version on a new volume HD1.2? (Choose one.)

Answer: A

Explanation:
When installing a hotfix on a new volume, you must reference both the base image and the hotfix image in a single command - the base ISO is required to build the volume first, then the hotfix is layered on top.


NEW QUESTION # 14
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.)

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 # 15
Which one of the following is aport and protocol combination allowedby theAllow Defaultsetting for Port Lockdown?

Answer: A

Explanation:
Port Lockdown controls which ports and protocols aSelf IPwill respond to.
TheAllow Defaultsetting permits only a predefined set of BIG-IP internal and required service ports.
The Allow Default listincludes:
* TCP 443# HTTPS (Management/TMUI access via Self-IP)
* TCP 4353 # CMI (device sync)
* TCP/UDP ports related to HA communication
* Other essential internal F5 ports
Why TCP 443 is correct:
* It is one of the officially allowed ports underAllow Default.
* It enables HTTPS/TMUI access through a Self IP.
Why the other options are incorrect:
A). TCP 80 (HTTP)
* Not allowed under Allow Default
* HTTP via Self-IP is blocked unless placed under Allow Custom
B). UDP 8443
* Not an F5 default service
* Not part of the Allow Default ports


NEW QUESTION # 16
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