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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Data Plane Concepts |
| Exam Number: | F5CAB2 |
| Exam Format: | Scenario-based, Multiple choice |
| Passing Score: | Not officially disclosed |
| Available Languages: | English |
| Related Certifications: | F5 Certified Administrator, BIG-IP |
| Exam Duration: | 30 minutes |
| Real Exam Qty: | 30 |
| Exam Price: | $50 USD |
| Certificate Validity Period: | 3 years |
| Recommended Training: | BIG-IP Administration Training Courses |
| Exam Registration: | Pearson VUE F5 Education Portal Certiverse |
| Sample Questions: | F5 F5CAB2 Sample Questions |
| Exam Way: | Online proctored (Certiverse) / In-person (Pearson VUE centers) |
| Pre Condition: | No mandatory prerequisites; can take in any order with other F5CAB exams |
| Official Syllabus URL: | https://education.f5.com/exams/big-ip-administration-data-plane-concepts |
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NEW QUESTION # 54
When using the setup utility to configure a redundant pair, you are asked to provide a "Failover Peer IP".
Which address is this?
Answer: D
Explanation:
When establishing a redundant pair, each device must know where to send its health heartbeats and sync data.
* The Peer IP:TheFailover Peer IPis the IP address belonging to theotherBIG-IP device in the HA pair.
This is typically a34Self-IP on a dedicated "HA" or "Internal" VLAN, or the Management IP.
* Purpose:It identifies the destination for the "Heartbeat" (the "Are you alive?" check).
* Setup Context:During the initial setup, you tell Device A to look for Device B at its "Failover Peer IP," and you tell Device B to look for Device A at its respective "Failover Peer IP."
NEW QUESTION # 55
Which statement is true concerning the default communication between a redundant pair of BIG-IP devices?
Answer: B
NEW QUESTION # 56
An application is configured so that the same pool member must be used for an entire session, as well as for HTTP and FTP traffic. A user reports that a session has terminated, and the user must restart the session. The BIG-IP Administrator determines that the active BIG-IP device failed over to the standby BIG-IP device.
Which configuration settings should the BIG-IP Administrator verify to ensure proper behavior when BIG-IP failover occurs?
Answer: C
Explanation:
In this scenario, two specific High Availability and Persistence requirements must be met to ensure session continuity during a failover.
* Persistence Mirroring:By default, persistence records (which map a client to a specific server) exist only on the memory of the active BIG-IP. If a failover occurs, the standby unit has no knowledge of these sessions and will re-load-balance the client, likely to a different server. EnablingPersistence Mirroringensures that the persistence table is synchronized in real-time to the standby peer.
* Match Across Services:The requirement specifies that the session must persist across bothHTTPand FTP. These are different Virtual Servers (and likely different ports). TheMatch Across Servicessetting in the persistence profile allows the BIG-IP to use the same persistence record for any Virtual Server that shares the same IP address and pool, regardless of the service port.
NEW QUESTION # 57
An application is configured so that thesame pool member must be used for an entire session, and this behavior must persist acrossHTTP and FTP traffic. A user reports that a session terminates and must be restarted after theactive BIG-IP device fails overto the standby device.
Which configuration settings should the BIG-IP Administrator verify to ensure proper behavior when BIG-IP failover occurs? (Choose one answer)
Answer: A
Explanation:
This scenario combinessession continuity,multiple protocols (HTTP and FTP), andHA failover behavior, which directly implicatespersistence handling across devices and services.
Key Requirements Breakdown
* Samepool member for entire session
* Session must survivefailover
* Session must spanmultiple services (HTTP and FTP)
Why Persistence Mirroring + Match Across Services Is Required
Persistence Mirroring
* Ensurespersistence records are synchronizedfrom the active BIG-IP to the standby BIG-IP.
* Without mirroring:
* After failover, the standby device hasno persistence table
* Clients are load-balanced again
* Sessions break, forcing users to restart
* Persistence mirroring is essential forsession continuity during failover Match Across Services
* Allows asingle persistence recordto be shared acrossmultiple virtual servers / protocols
* Required when:
* HTTP and FTP must use thesame pool member
* Multiple services are part of a single application session
Together, these settings ensure:
* Persistence survivesdevice failover
* Persistence is honoredacross HTTP and FTP
Why the Other Options Are Incorrect
* A. Cookie persistence and session timeoutCookie persistence only applies to HTTP and does not address FTP or failover synchronization.
* B. Stateful failover and Network Failover detectionStateful failover applies toconnection state, not persistence records, and does not link HTTP and FTP sessions.
* D. SYN-cookie insertion threshold and connection low-water markThese are DoS / SYN flood protection settings, unrelated to persistence or HA behavior.
NEW QUESTION # 58
The diagram below shows the TCP connection setup for an application.
Which of the following virtual server types applies? (Choose one answer)
Answer: A
Explanation:
The diagram illustrates a specific TCP handshake sequence where the BIG-IP system acts as a transparent forwarder rather than a full proxy. The key indicators that identify this as a Forwarding (IP) virtual server are as follows:
Initial Packet Processing: The diagram explicitly states that the LTM evaluates the packet looking only at the destination IP address. This is the fundamental characteristic of a Forwarding IP virtual server, which uses the system's routing table to make forwarding decisions instead of load balancing to a pool of members.
Handshake Sequence: Unlike a Standard virtual server, which completes the three-way handshake with the client (SYN, SYN-ACK, ACK) before initiating a separate connection to the server, the Forwarding IP virtual server passes the client's original SYN packet directly to the destination node.
Response Timing: The BIG-IP system waits for the SYN-ACK from the destination node before it sends a SYN-ACK back to the client. It essentially "passes through" the handshake signals while still maintaining a state entry in the connection table to track the flow.
Packet-by-Packet Logic: While it tracks the state, it does not perform address translation (unless SNAT is specifically configured) or deep packet inspection like a full proxy would.
Why other options are incorrect:
Standard virtual server: A Standard virtual server is a "full proxy." It would finish the handshake with the client first and only then open a second, independent TCP connection to the backend server.
Stateless virtual server: A stateless virtual server does not track connections in the connection table. The diagram shows the system meticulously passing sequence numbers ($seq\_num$) and acknowledgment numbers ($ack\_num$) between the two sides, which requires stateful tracking of the TCP flow.
NEW QUESTION # 59
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