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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | F5 BIG-IP Administration Data Plane Configuration (F5CAB3) |
| Exam Number: | F5CAB3 |
| Available Languages: | English |
| Certificate Validity Period: | 2 years |
| Exam Format: | Multiple choice |
| Related Certifications: | F5 Certified BIG-IP Administrator |
| Recommended Training: | F5 Learning Portal F5 BIG-IP Administration Training |
| Exam Registration: | Pearson VUE F5 Exams F5 Certification Portal |
| Sample Questions: | F5 F5CAB3 Sample Questions |
| Exam Way: | Online proctored exam via Pearson VUE or authorized testing centers |
| Pre Condition: | Recommended foundational knowledge of networking concepts (TCP/IP, routing, load balancing). |
| Official Syllabus URL: | https://www.f5.com/services/training-certification/certification |
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NEW QUESTION # 27
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?
(Pick the 2 correct responses below)
Answer: A,D
Explanation:
To determine if an iRule is influencing traffic for a specific Virtual Server, the administrator must verify the association between the Virtual Server object and any applied scripts. In the BIG-IP Configuration Utility (GUI), this association is found under the Resources tab of the specific Virtual Server. While there is an
"iRules" sub-menu under Local Traffic, checking the Virtual Server's Resources tab is the definitive way to see which specific rules are currently active and in what order they are being processed for that particular traffic flow.
From the Command Line Interface (CLI), the tmsh list /ltm virtual <virtual_server> command provides a full text-based output of the virtual server's configuration. If iRules are applied, they will appear within a "rules {
... }" block in the command output. This is more effective than Option A, which only lists the contents of the iRule itself but does not show if or where it is applied. Option C is a common misconception; while some versions of the GUI have reorganized menus, the standard location for managing the association of profiles, policies, and iRules to a Virtual Server remains the "Resources" section. By identifying the applied iRule, an administrator can then review the script logic-often containing commands like pool or node-to see if it is overriding the default pool selection based on specific HTTP headers, URI paths, or client IP addresses.
NEW QUESTION # 28
A Standard Virtual Server reports poor network performance for Internet-based clients.
What configuration should be applied?
Answer: B
Explanation:
WAN TCP profiles are optimized for high latency and packet loss typical of Internet clients, while LAN profiles are ideal for backend servers.
NEW QUESTION # 29
Local Traffic Network Map: VS_HTTP # POOL_WEB # 192.168.212.30:80 Pool Member | Parent Node
192.168.212.30 Port 80
Why is the virtual server unresponsive to incoming connections?
Answer: B
Explanation:
In the BIG-IP object hierarchy, a Pool Member is a child object of a Node . A pool member represents a specific IP:Port combination, while the parent node represents the underlying server IP address. When a node is disabled , all pool members that are children of that node are rendered unavailable - regardless of the individual pool member ' s own health or enabled state.
The Network Map depicted shows the pool member (192.168.212.30:80) with its Parent Node (192.168.212.30) disabled. This parent-child dependency means that even if the pool member itself is healthy and enabled, the disabled node cascades its unavailable state downward, causing the pool to have no available members and rendering VS_HTTP unresponsive to incoming connections.
The other options can be eliminated as follows:
* Pool member monitor failed - the monitor status is not indicated as failed in the Network Map display.
* Pool member is disabled - the pool member itself is not shown as disabled; the parent node is.
* Node monitor failed - no monitor failure is indicated; the node ' s administrative state is explicitly disabled.
Understanding the node-to-member inheritance of availability state is fundamental to accurate BIG-IP traffic troubleshooting.
Reference: BIG-IP Administration - Data Plane Configuration, Module: Pool Members, Nodes, and Availability State Inheritance.
NEW QUESTION # 30
A BIG-IP Administrator needs to apply persistence to a virtual server that is configured as a Performance (Layer 4) virtual server that allows access to a secure (TLS) e-commerce website.
What type of persistence profile can be used? (Choose one answer)
Answer: A
Explanation:
A Performance (Layer 4) virtual server does not inspect or process application-layer data such as HTTP headers or cookies. Therefore, only Layer 4-compatible persistence methods can be used.
According to the BIG-IP Administration: Data Plane Configuration documentation:
* Source Address Affinity persistence operates at Layer 4 and uses the client IP address to maintain session persistence.
* It is fully compatible with Performance (Layer 4) virtual servers.
* It works regardless of encryption, making it suitable for TLS-secured applications.
Why the other options are incorrect:
* B. Cookie persistenceRequires an HTTP profile and Layer 7 inspection, which is not supported on Performance virtual servers.
* C. Microsoft RDP persistenceIs protocol-specific and not applicable to web-based TLS traffic.
* D. Host persistenceRequires HTTP host header inspection, which is not available at Layer 4.
Correct Resolution:
Source Address Affinity persistence is the appropriate choice for maintaining persistence on a Performance (Layer 4) virtual server handling TLS traffic.
Below is Batch 1 (Questions 1-10) extracted only from your uploaded document that are directly related to BIG-IP Administration: Data Plane Configuration topics (Virtual Servers, Pools, Load Balancing, Monitors, Persistence, SNAT, Profiles).
I have excluded system-only, licensing, support, hardware, HA management-only, and admin UI questions that are not Data Plane-focused.
Source: Your uploaded TMOS Administration v2.0 document
# BATCH 1 (10 Questions)
NEW QUESTION # 31
Some users who connect to a busy Virtual Server have connections reset by the BIG-IP system. Pool member resources are NOT a factor.
What is a possible cause?
Answer: C
Explanation:
When the connection limit is reached, BIG-IP resets new connections, even if pool members are healthy.
NEW QUESTION # 32
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