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F5 F5CAB1 Exam Syllabus Topics:

Section	Weight	Objectives
System Upgrade and Maintenance	20%	- Post-upgrade verification 1. Configuration validation 2. System health check - Upgrade procedures 1. Apply hotfixes and patches 2. Perform software upgrades
Management Connectivity and Configuration	20%	- Management network setup 1. Route and gateway settings 2. Management IP configuration - Initial system setup 1. Setup utility usage 2. Basic network configuration
Licensing	20%	- License activation 1. License registration process 2. License file management - Module licensing and provisioning 1. Provision and de-provision modules 2. Identify licensed modules
Software Image Management	20%	- Installation and upgrade preparation 1. Backup and recovery planning 2. Compatibility verification - Image acquisition and storage 1. Image storage and organization 2. Download software images
Securing BIG-IP	20%	- Administrative access controls 1. Access restrictions 2. User accounts and roles - Management security 1. Secure management protocols 2. Port lockdown settings

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F5 BIG-IP Administration Install, Initial Configuration, and Upgrade Sample Questions (Q14-Q19):

NEW QUESTION # 14
When using the tmsh shell of a BIG-IP system, which command will display the management-ip address?

A. list /sys management-ip
B. run /util bash ifconfig mgmt
C. show /sys management-ip

Answer: A

NEW QUESTION # 15
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. The administrator needs to switch to the "Advanced" view mode in order to display the relevant setting
B. The administrator must restrict access by IP address for SSH, which will implicitly restrict access to the Configuration Utility
C. 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
D. Restricting access to the Configuration Utility can only be done from the Command Line Interface

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 # 16
Which one of the following is aport and protocol combination allowedby theAllow Defaultsetting for Port Lockdown?

A. TCP 80
B. TCP 443
C. UDP 8443

Answer: B

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 # 17
The Port Lockdown feature prevents unwanted connection attempts to a Self IP. Which three types of connection attempts are unaffected by Port Lockdown settings?

A. Defined virtual server traffic, Internet Control Message Protocol (ICMP), Centralized Management Infrastructure (CMI)
B. Centralized Management Infrastructure (CMI), Secure Shell (SSH), Internet Control Message Protocol (ICMP)
C. Defined virtual server traffic, Secure Shell (SSH), Centralized Management Infrastructure (CMI)

Answer: A

Explanation:
Port Lockdown controls which ports and protocols a Self IP will respond to.
However, certain traffic types bypass Port Lockdown for BIG-IP functionality and routing integrity.
The three types that are NOT affected by Port Lockdown are:
1. Defined Virtual Server Traffic
Traffic destined to a Self IP that matches a configured virtual server is 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 is TCP 4353, which is always permitted.

NEW QUESTION # 18
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. Delete unused routes
D. Deactivate all SSL certificates

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 # 19
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