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F5 F5CAB5 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Determine resource utilization: This domain covers analyzing system resources including control plane versus data plane usage, CPU statistics per virtual server, interface statistics, and disk and memory utilization.
Topic 2
  • Identify the reason a pool is not working as expected: This domain focuses on troubleshooting pools including health monitor failures, priority group membership, and configured versus availability status of pools and members.
Topic 3
  • Identify the reason a virtual server is not working as expected: This section covers diagnosing virtual server issues including availability status, profile conflicts and misconfigurations, and incorrect IP addresses or ports.
Topic 4
  • Given a scenario, review basic stats to confirm functionality: This section involves interpreting traffic object statistics and network configuration statistics to validate system functionality.
Topic 5
  • Identify network level performance issues: This section focuses on diagnosing network problems including packet capture needs, interface availability, packet drops, speed and duplex settings, and TCP profile optimization.,
Topic 6
  • Given a scenario, interpret traffic flow: This domain covers understanding traffic patterns through client-server communication analysis and interpreting traffic graphs and SNMP results.

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F5 BIG-IP Administration Support and Troubleshooting Sample Questions (Q26-Q31):

NEW QUESTION # 26
A user wants to use the iHealth Upgrade Advisor to determine any issues with upgrading TMOS.
Where can the user generate the QKView to upload to iHealth?

Answer: C

Explanation:
To utilize the F5 iHealth service, a BIG-IP Administrator must generate a diagnostic snapshot of the system known as a QKView file.
GUI Path: In the BIG-IP Configuration Utility (GUI), the QKView generation tool is located under System > Support.
Process: On the Support page, the user selects the "New Support Snapshot" button. From there, they ensure "QKView" is selected. Once the BIG-IP finishes collecting the data (which includes logs, configuration, and hardware statistics), the user can download the resulting .qkview file directly to their local machine.
iHealth Integration: This file is then uploaded to ihealth.f5.com. The Upgrade Advisor tool within iHealth specifically parses this QKView to check the current configuration against known bugs, hardware limitations, or syntax changes in the target TMOS version.


NEW QUESTION # 27
The BIG-IP is experiencing issues with data plane resources. Which traffic processing would be most impacted?

Answer: C

Explanation:
The BIG-IP architecture is divided into two distinct planes: the Control Plane (Management) and the Data Plane (Traffic Management Microkernel - TMM).
Data Plane (TMM): This plane is responsible for the actual processing of application traffic, including load balancing, SSL offloading, and session management for modules like APM (Access Policy Manager). If data plane resources (CPU/Memory allocated to TMM) are exhausted, active user sessions and traffic throughput are directly degraded.
APM Sessions: Because APM sessions are managed within the TMM process to ensure high- speed access control and tunneling, they are a primary "Data Plane" function.


NEW QUESTION # 28
Refer to the exhibit.

A BIG-IP Administrator configured a virtual server with a pool of 3 members and selected the Round Robin load balancing method to evenly distribute traffic across the pool members. During initial testing, traffic was not evenly distributed and the pool member 172.16.20.3 received more traffic than the other pool members.
Refer to the exhibit and the virtual server configuration provided below:
Plaintext
ltm virtual http.vs {
destination 10.10.1.100:http
ip-protocol tcp
mask 255.255.255.255
persist {
source_addr { default yes }
}
pool http.pool
profiles {
tcp{}
}
serverssl-use-sni disabled
source 0.0.0.0/0
source-address-translation {
type automap
}
translate-address enabled
}
What is the most likely cause of this behavior?

Answer: D

Explanation:
The primary reason for the uneven traffic distribution is the presence of a Persistence Profile in the virtual server configuration.
Load Balancing vs. Persistence: While the Round Robin method is designed to distribute new connections sequentially among pool members, Persistence overrides this logic for existing clients.
Source Address Persistence: The configuration shows source_addr persistence is enabled. This ensures that once a client (identified by their source IP) is mapped to a pool member, all subsequent connections from that same IP will be sent to the same member for the duration of the persistence record.
Uneven Distribution Logic: If one source IP address generates significantly more connections or longer-lived sessions than others--or if many clients appear behind a single NAT/Proxy IP--that specific pool member (in this case, 172.16.20.3) will receive a disproportionate amount of traffic compared to the others.


NEW QUESTION # 29
Where should the BIG-IP Administrator go in the GUI to verify the status of pool members of a pool?

Answer: A

Explanation:
To verify the specific health and availability status of individual members within a specific pool, the administrator must navigate to the Members tab of that specific pool.
* Navigation Path: The correct path is Local Traffic > Pools > Pool List, then clicking on the name of the <pool_in_question>, and finally selecting the Members tab. This screen provides a granular view of each member's IP address, port, and their current status (indicated by the colored icons: Green, Red, Yellow, or Blue).
* Why Option A is correct: While you can see a general status summary on the Pool List page (Option B), that page only shows the status of the pool as a whole. To troubleshoot why a pool is not working or to see which specific member is down, you must drill down into the Members tab.
* Evaluation of Other Options:
* Local Traffic -> Pools (Option B): This leads to the Pool List. It shows the aggregate status of all pools but does not list individual member details or their specific monitor results without further clicking.
* Local Traffic -> Virtual Servers -> Statistics (Option C): This path shows traffic statistics (bits in/out, connections) for virtual servers, not the health monitor status of individual pool members.
* Local Traffic -> Nodes (Option D): While this shows the health of the underlying IP address (Node), it does not show the status of the specific service (Port/Member) within a pool. A Node might be "Up" (ICMP), while the Pool Member is "Down" (HTTP failure).


NEW QUESTION # 30
A BIG-IP Administrator needs to view the CPU utilization of a particular Virtual Server. Which section of the Configuration Utility should the administrator use for this purpose?

Answer: B

Explanation:
When a BIG-IP system experiences high overall CPU usage, troubleshooting requires identifying which specific application or service is the primary consumer of resources. While the system-wide performance graphs provide a global view, the granular data necessary to isolate a "top talker" is found in the "Local Traffic" statistics. Navigating to Statistics > Module Statistics > Local Traffic > Virtual Servers allows the administrator to see specific metrics for each configured virtual server, including the number of packets processed, current connections, and critical CPU cycles consumed. This is essential for troubleshooting performance issues where an inefficient iRule, high SSL handshake volume, or complex L7 profiles (like Compression or ASM) might be overtaxing the Traffic Management Microkernel (TMM) for one specific application. By reviewing these basic stats, an administrator can determine if a performance bottle-neck is a system-wide h1ardware issue or if it is isolated to a single virtual server, enabling targeted remediation such as optimizing iRule logic or moving the high-load virtual server to a dedicated device.


NEW QUESTION # 31
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