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| Certification Vendor: | F5 Networks |
|---|---|
| Exam Name: | F5 Certified BIG-IP Administrator: Data Plane Configuration |
| Exam Number: | F5CAB3 |
| Exam Duration: | 120 minutes |
| Exam Price: | $160 USD |
| Exam Format: | Multiple Select, Build List, Multiple Choice |
| Real Exam Qty: | 60-80 |
| Certificate Validity Period: | 2 years |
| Related Certifications: | F5 Certified Specialist, Data Plane Configuration F5 Certified BIG-IP Administrator (F5-CA) |
| Passing Score: | 247 out of 350 (approximately 70%) |
| Available Languages: | English |
| Sample Questions: | F5 F5CAB3 Sample Questions |
| Exam Way: | Online proctored or test center |
| Pre Condition: | Recommended: F5 Certified Administrator certification or equivalent experience with BIG-IP LTM |
| Official Syllabus URL: | https://www.f5.com/go/certification |
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| Topic | Details |
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| Topic 1 |
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| Topic 2 |
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NEW QUESTION # 26
A Standard Virtual Server for a web application is configured with Automap for Source Address Translation. The original client IP must be known by backend servers.
What should the BIG-IP Administrator configure?
Answer: D
Explanation:
The X-Forwarded-For header preserves the original client IP when SNAT is enabled.
NEW QUESTION # 27
A configuration change is made on the standby member of a device group. What is displayed as
"Recommended Action" on the Device Management Overview screen?
Answer: A
Explanation:
The BIG-IP system uses a centralized management framework to ensure that all devices within a Sync- Failover group share a consistent configuration. When an administrator makes a change on any member of the group-whether it is the active or the standby device-the system detects a "ConfigSync" mismatch. The
"Device Management >> Overview" screen tracks these changes by comparing the commit ID and timestamps of the configurations across all peers.
If a change is made on the standby member, that device now possesses a more recent configuration than the other members of the group. Consequently, the BIG-IP GUI will display a status of "Changes Pending" and suggest a Recommended Action to resolve the discrepancy. In this scenario, the correct action is to Synchronize the standby member configuration to the group. This push operation will copy the updated configuration from the standby device to the active device (and any other peers), bringing the entire cluster back into a "In Sync" status. It is important to note that BIG-IP allows bi-directional synchronization; you do not have to be on the active device to push a configuration. However, administrators must be cautious:
choosing Option C (Synchronizing the active member to the group) would overwrite the changes just made on the standby device with the older configuration from the active device, effectively reverting the changes. The Recommended Action always points toward the direction that propagates the most recent change to the rest of the group.
NEW QUESTION # 28
A BIG-IP Administrator needs to apply a health monitor for a pool of database servers named DB_Pool that uses TCP port 1521. Where should the BIG-IP Administrator apply this monitor?
Answer: A
Explanation:
In BIG-IP configuration, health monitors can be applied at three distinct levels: the node, the pool, or the individual pool member. To ensure that a specific application service-in this case, a database service on port
1521-is functioning correctly for the entire pool, the administrator should apply the monitor at the pool level. Navigating to Local Traffic > Pools > DB.Pool > Properties allows the administrator to select one or more monitors from the "Available" list and move them to the "Active" list.
Applying a monitor at the pool property level ensures that the BIG-IP checks the health of every member assigned to that pool using the same logic. If a database-specific monitor (such as a TCP handshake or an Oracle/SQL check) fails for a specific member, the BIG-IP marks that member as "offline" for that specific pool, preventing new connections from being sent to it. While monitors can be applied to Pool Members (Option D) to give different members unique monitoring logic, it is more administratively efficient to apply it to the pool properties when all servers are expected to behave identically. Applying it to Nodes (Option C) would only verify that the IP address is up (typically via ICMP), which does not guarantee that the database service on port 1521 is actually responding. Finally, Profiles (Option A) are used to define how traffic is handled once it is accepted by a Virtual Server, not for the proactive health checking of backend resources.
Therefore, the pool properties page is the standard location for configuring service-specific availability requirements.
NEW QUESTION # 29
A virtual server is configured to offload SSL from a pool of backend servers. When users connect to the virtual server, they successfully establish an SSL connection but no content is displayed. A packet trace performed on the server shows that the server receives and responds to the request. What should a BIG-IP Administrator do to resolve the problem?
Answer: C
Explanation:
This scenario describes a classic routing issue often encountered during SSL offload deployments. The fact that an SSL connection is established indicates the Client SSL profile is working correctly. The packet trace showing the server "receives and responds" to the request is the most critical diagnostic clue.
When a BIG-IP receives traffic, it typically passes the client's original source IP address to the backend server. If the backend server's default gateway is not the BIG-IP (a common "one-arm" network topology), the server will attempt to send its response directly back to the client's IP via its own default router. The client's browser will reject this response because it expects traffic to come from the Virtual Server's IP, not the backend server's IP.
To resolve this, the administrator must enable SNAT (Source Address Translation), typically using SNAT Automap. When SNAT is enabled, the BIG-IP replaces the client's original source IP with one of its own Self IPs before forwarding the request to the server. Because the source of the packet is now the BIG-IP, the backend server is forced to send its response back to the BIG-IP. The BIG-IP then receives the response, translates it back, and delivers the content to the user. Option A is unnecessary if the servers are expecting plain-text traffic after the BIG-IP performs offload. Option D would only worsen the existing routing discrepancy.
NEW QUESTION # 30
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: C,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 # 31
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