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[Hardware] 100% Pass 2026 Efficient F5 Interactive F5CAB1 EBook

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【Hardware】 100% Pass 2026 Efficient F5 Interactive F5CAB1 EBook

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F5 F5CAB1 Exam Syllabus Topics:
TopicDetails
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 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 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.

F5 BIG-IP Administration Install, Initial Configuration, and Upgrade Sample Questions (Q43-Q48):NEW QUESTION # 43
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 performs a reboot into the 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 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 # 44
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 Management
  • B. The Self-IP port lockdown behavior could be adjusted toAllow Mgmt
  • C. The Self-IP port lockdown behavior could be adjusted toAllow All
  • D. The Self-IP port lockdown behavior could be adjusted toAllow Default
Answer: A,B
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 # 45
The Port Lockdown feature prevents unwanted connection attempts to a Self IP.
Which three types of connection attempts areunaffectedby Port Lockdown settings?
  • A. Defined virtual server traffic, Secure Shell (SSH), Centralized Management Infrastructure (CMI)
  • B. Centralized Management Infrastructure (CMI), Secure Shell (SSH), Internet Control Message Protocol (ICMP)
  • 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 # 46
Which of the following areresource allocation (provisioning) settingsfor BIG-IP modules?
(Choose two.)
  • A. Dedicated
  • B. Maximum
  • C. Limited
  • D. Nominal
Answer: A,D
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 # 47
Which port is an exception to the Port Lockdown function of Self-IPs if a device-group synchronization cluster is configured?
  • A. TCP 4353
  • B. UDP 53
  • C. TCP 443
Answer: A
Explanation:
Self-IPs implement a security feature known asPort Lockdown, which limits which services are reachable on a Self-IP.
However, certain services required for BIG-IP device-to-device communication bypass Port Lockdown to ensure cluster and HA functionality.
TCP 4353
* TCP port4353is used byDevice Service Clustering (DSC)for:
* Device trust establishment
* Configuration synchronization
* Failover communication
* Because BIG-IP devices must always be able to communicate for HA functions to remain operational, port 4353 isexempt from Port Lockdown rules.
Why the other options are incorrect
A). TCP 443
* Not required for device trust or synchronization.
* HTTPS access is fully controlled by Port Lockdown.
C). UDP 53
* DNS traffic is not required for synchronization and has no exemption under Port Lockdown.

NEW QUESTION # 48
......
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