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F5 F5CAB3 Exam Syllabus Topics:

SectionObjectives
Topic 1: Advanced Traffic Control- Monitoring and Health Checks
  • 1. Service health evaluation
    • 2. Active and passive monitors
      - iRules and Traffic Steering
      • 1. Basic iRule syntax and logic
        • 2. Event-based traffic manipulation
          Topic 2: F5 BIG-IP System Fundamentals- Initial Configuration and System Components
          • 1. System setup and licensing concepts
            • 2. Management and self IP architecture
              - Architecture Overview of BIG-IP Platform
              • 1. Traffic management concepts (data plane vs control plane)
                • 2. TMM (Traffic Management Microkernel) basics
                  Topic 3: Traffic Management and Load Balancing- Load Balancing Methods
                  • 1. Round robin, least connections, ratio-based methods
                    • 2. Persistence and session handling
                      - Virtual Servers and Pools
                      • 1. Virtual server types and configuration
                        • 2. Pool member selection and availability
                          Topic 4: Traffic Processing and Policies- Address Translation
                          • 1. Traffic flow translation behavior
                            • 2. SNAT and NAT concepts
                              - Profiles and Protocol Handling
                              • 1. HTTP, TCP, SSL profiles configuration
                                • 2. Connection handling and optimization
                                  Topic 5: High Availability and Troubleshooting- Device Service Clustering (DSC)
                                  • 1. Failover concepts and device groups
                                    • 2. State synchronization mechanisms
                                      - Diagnostics and Troubleshooting Tools
                                      • 1. Common failure scenarios and resolution methods
                                        • 2. Logging and traffic analysis tools

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                                          F5 BIG-IP Administration Data Plane Configuration Sample Questions (Q21-Q26):

                                          NEW QUESTION # 21
                                          Users are unable to reach an application. The Virtual Server shows a red diamond status.
                                          What is the cause?

                                          Answer: C

                                          Explanation:
                                          A red diamond indicates that the Virtual Server is enabled but unavailable, typically due to all pool members being down.


                                          NEW QUESTION # 22
                                          How can a BIG-IP Administrator identify a configuration object that has been configured within an iApp?

                                          Answer: C

                                          Explanation:
                                          In F5 BIG-IP systems, an iApp is a template-driven framework used to deploy and manage application- specific configurations. When an iApp is deployed, the system creates a specialized folder or " Application Service " container to hold all the resulting Local Traffic Manager (LTM) objects, such as virtual servers, pools, and profiles. This container is visually and programmatically identified by the .app extension in its path name.
                                          The naming convention for these objects follows a specific hierarchical structure: / < partition > / < iapp_name > .app/ < object_name > . For example, if an administrator creates an iApp named " testhttp " in the " /Common " partition, the virtual server created by that iApp would be identified in the configuration (TMSH) and the GUI as /Common/testhttp.app/testhttp. This structure allows the BIG-IP system to distinguish between manually created objects and those managed by the iApp ' s automation logic.
                                          This identification is crucial because iApp-managed objects typically have Strict Updates enabled, which prevents administrators from making direct manual changes to the object settings outside of the iApp ' s reconfigure interface. Attempting to modify such an object directly will result in an error message stating that the application service must be updated using an application management interface. By recognizing the .app path and the repeated name within the structure, an administrator can immediately identify that the object belongs to an iApp and should be managed through the iApp ' s specific management screen rather than standard LTM configuration menus.


                                          NEW QUESTION # 23
                                          Refer to the exhibit.

                                          A BIG-IP Administrator creates a new Virtual Server to load balance SSH traffic. Users are unable to log on to the servers.
                                          What should the BIG-IP Administrator do to resolve the issue? (Choose one answer)

                                          Answer: A

                                          Explanation:
                                          SSH is a Layer 4 TCP-based protocol that operates on TCP port 22 and does not use HTTP in any capacity. In the exhibit, the Virtual Server is configured with an HTTP Profile applied, which is inappropriate for SSH traffic and causes connection failures.
                                          According to the BIG-IP Administration: Data Plane Configuration documentation:
                                          * An HTTP profile must only be applied to Virtual Servers handling HTTP or HTTPS traffic.
                                          * When an HTTP profile is attached, BIG-IP expects HTTP headers and attempts to parse application- layer data.
                                          * Non-HTTP protocols such as SSH, FTP (control), SMTP, and other raw TCP services will fail if an HTTP profile is enabled.
                                          Why the other options are incorrect:
                                          * A. Set Protocol to UDPSSH uses TCP, not UDP. Changing the protocol would break SSH entirely.
                                          * B. Set Source Address to 10.1.1.2The source address setting controls client access restrictions and is unrelated to protocol parsing issues.
                                          * C. Set Destination Address/Mask to 0.0.0.0/0The destination address is already valid for a specific SSH service and does not impact protocol handling.
                                          Correct Resolution:
                                          The BIG-IP Administrator should remove the HTTP Profile (set it to None) so the Virtual Server functions as a pure Layer 4 TCP service, allowing SSH connections to pass through successfully.


                                          NEW QUESTION # 24
                                          Application administrators are reporting that nodes different from those configured in the pool are selected.
                                          The use of an iRule is suspected.
                                          How can the BIG-IP Administrator check if an iRule is used for this traffic? (Choose two answers)

                                          Answer: B,C

                                          Explanation:
                                          In BIG-IP systems, iRules influence traffic only when they are attached to a Virtual Server. If application traffic is being sent to nodes or pool members that are not defined in the pool, this typically indicates that an iRule is overriding the default load-balancing behavior by explicitly selecting a pool or node.
                                          According to BIG-IP Administration: Data Plane Configuration and official F5 guidance:
                                          * iRules are associated with Virtual Servers, not directly with pools or nodes.
                                          * To determine whether an iRule is actively affecting traffic, the administrator must inspect the Virtual Server configuration.
                                          Explanation of the correct answers:
                                          * B. Via the GUI at the Resources tab for the virtual serverThe Resources tab in the Configuration Utility displays all traffic-handling objects applied to the Virtual Server, including assigned iRules. This is the primary GUI location to verify whether an iRule is influencing data plane traffic.
                                          * C. Via TMSH with the list /ltm virtual <virtual_server> commandThis TMSH command displays the full Virtual Server configuration, including any iRules listed under the rules section. It is the authoritative CLI method to confirm iRule usage.
                                          Why the other options are incorrect:
                                          * A. Via TMSH with the list /ltm rule <irule> commandThis command only shows the contents of an iRule and does not indicate whether the iRule is attached to or used by any Virtual Server.
                                          * D. Via the GUI at the iRule tab for the virtual serverBIG-IP does not provide a dedicated "iRule" tab on Virtual Servers. iRules are viewed and managed under the Resources tab.
                                          Correct Conclusion:
                                          To verify whether an iRule is responsible for unexpected node selection, the BIG-IP Administrator must examine the Virtual Server configuration, either through the Resources tab in the GUI or by using TMSH to list the Virtual Server configuration.


                                          NEW QUESTION # 25
                                          What is the status of a pool member when manual resume is enabled and a health check first fails and then passes?

                                          Answer: A

                                          Explanation:
                                          With manual resume enabled, BIG-IP does not automatically return a pool member to service after recovery. The member remains offline until manually re-enabled.


                                          NEW QUESTION # 26
                                          ......

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