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F5 F5CAB5 Exam Overview:

Certification Vendor:F5 Networks
Exam Name:BIG-IP Administrator
Exam Number:101
Exam Duration:90 minutes
Real Exam Qty:80
Related Certifications:F5 Certified Solution Expert - Security
F5 Certified Solution Expert - LTM
Exam Format:Scenario-based, Multiple Choice
Available Languages:English, Japanese
Passing Score:70%
Certificate Validity Period:2 years
Exam Price:USD $160
Sample Questions:F5 F5CAB5 Sample Questions
Exam Way:Online proctored or at Pearson VUE testing center
Pre Condition:F5 recommends completing F5 BIG-IP Administrator certification training or having equivalent hands-on experience with BIG-IP LTM
Official Syllabus URL:https://support.f5.com/csp/education-certification

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F5 F5CAB5 Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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 2
  • 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 3
  • 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.

F5 BIG-IP Administration Support and Troubleshooting Sample Questions (Q51-Q56):

NEW QUESTION # 51
A BIG-IP Administrator configured the following virtual server to pass traffic on all addresses and ports.
After configuration is completed, the BIG-IP Administrator notices that the virtual server is unable to pass traffic.
Plaintext
ltm virtual forwarding_any_vs {
destination 0.0.0.0:any
ip-forward
mask 255.255.255.255
profiles {
fastL4 {}
}
serverssl-use-sni disabled
source 0.0.0.0/0
translate-address disabled
translate-port disabled
}
Which part of the configuration is the cause of the issue?

Answer: A

Explanation:
The failure of the Forwarding (IP) virtual server is caused by an incorrect Network Mask configuration for a wildcard destination.
* Wildcard Destination: The administrator intends to create a "Wildcard" Virtual Server that listens for any destination IP address (0.0.0.0).
* The Mask Conflict: A mask of 255.255.255.255 (or /32) tells the BIG-IP to look for a specific, single host address. When combined with 0.0.0.0, the system is literally looking for traffic destined for the IP
0.0.0.0, which is not a valid routable destination for standard traffic.
* Correct Configuration: To allow the virtual server to catch traffic for any IP address, the mask must be changed to 0.0.0.0 (or /0). This signifies that the system should ignore all bits of the destination address and match everything.
* Forwarding Logic: The rest of the configuration-including ip-forward (Forwarding IP type), translate-address disabled, and translate-port disabled-is correct for a BIG-IP acting as a router
/gateway.


NEW QUESTION # 52
When using the "Manual Resume" feature in BIG-IP, what state will a pool member remain in after a health monitor failure, even if health checks begin to pass again?

Answer: D

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Support and Troubleshooting documents: The "Manual Resume" feature is a safety mechanism used when a pool is not working as expected due to flapping services or unstable backend applications. Normally, when a health monitor fails, the pool member is marked "Offline" (Red), and when the monitor passes, it automatically returns to "Available" (Green)47. However, if "Manual Resume" is enabled, the BIG-IP will not automatically put the member back into rotation after a failure48. Even if the health check begins to pass again, the member remains in an
"Offline (Disabled)" state49. This requires an administrator to manually intervene and re-enable the member.
This is a common point of confusion when troubleshooting; a member may show passing health checks but still not receive traffic because it is waiting for a manual administrative "resume" command. This feature is intended to prevent "unhealthy" servers from receiving traffic until an engineer has confirmed the root cause of the initial failure was resolved.


NEW QUESTION # 53
A BIG-IP Administrator uses backend servers to host multiple services per server. There are multiple virtual servers and pools defined, referencing the same backend servers. Which load balancing algorithm is most appropriate to have an equal number of connections on each backend server?17

Answer: A

Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Support and Troubleshooting documents: When load balancing is not working as 23expected and connections appear skewed across physical hardware, the administrator must distinguish between "member"24 and "node" level balancing. A "member" refers to a specific IP and Port combination (e.g., 10.1.1.1:80), whereas a "node" refers to the underlying IP address (10.1.1.1) regardless of the port25. If a single server hosts multiple services (Web, FTP, API) across different pools, using "Least Connections (member)" would only balance connections within each individual pool26. This could lead to a scenario where one server is overwhelmed because it is winning the "least connections" count in three different pools simultaneously. By selecting "Least Connections (node)," the BIG-IP tracks the total number of concurrent connections to the physical IP address across all pools it belongs to27. This ensures that the administrator can maintain an equal distribution of work across the hardware, preventing performance degradation on backend servers that host multiple application services.


NEW QUESTION # 54
A BIG-IP Administrator creates a new Virtual Server. The end user is unable to access the page. During troubleshooting, the administrator learns that the connection between the BIG-IP system and server is NOT set up correctly. What should the administrator do to solve this issue?

Answer: D

Explanation:
When a virtual server is not working as expected despite the pool members being marked "UP" (Green), the issue is frequently a return-path routing failure. If the BIG-IP forwards a request with the original client's source IP address, the backend server will try to respond directly to that client. If the server does not have its default gateway pointed back to the BIG-IP, the response packet will be routed elsewhere (or dropped), resulting in a connection timeout for the user. To resolve this, the administrator must configure "Source Address Translation" (SNAT). By setting SNAT to "Automap" or a specific SNAT address, the BIG-IP replaces the client's IP with its own internal self-IP. The backend server then sees the BIG-IP as the source and sends the response back to it locally. This troubleshooting step ensures a functional, symmetric tr18affic flow. Identifying the need for SNAT is one of the most common troubleshooting tasks for new virtual server deployments where the BIG-IP is not the default gateway for the backend servers.


NEW QUESTION # 55
What information is required for a BIG-IP Administrator to open an F5 Support ticket?

Answer: C

Explanation:
To ensure a support case is processed and routed efficiently, F5 specifies a mandatory set of baseline information.
* Serial Number: Required to verify the support contract and entitlement level for the hardware or virtual edition.
* QKView: This is described as the "first and most important thing to have when opening a case". It provides the F5 Support Engineer with the necessary diagnostic data to understand the system's current state and resource utilization.
* Problem Description: A precise description of the issue, including symptoms, when the problem started, and the business impact, is critical for routing the case to the correct technical team.
* Contact Info: Accurate contact information for the individual who will be working on the ticket with F5.
* Comparison: While packet captures (Option A) or UCS files (Option B) are often useful, they are not strictly required for the initial opening of all support tickets; however, a QKView is considered a primary prerequisite for technical analysis.


NEW QUESTION # 56
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