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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Data Plane Concepts |
| Exam Number: | F5CAB2 |
| Related Certifications: | F5 Certified Administrator, BIG-IP |
| Real Exam Qty: | 30 |
| Passing Score: | Not officially disclosed |
| Exam Format: | Scenario-based, Multiple choice |
| Exam Duration: | 30 minutes |
| Exam Price: | $50 USD |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Recommended Training: | BIG-IP Administration Training Courses |
| Exam Registration: | Certiverse F5 Education Portal Pearson VUE |
| 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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37. Frage
Active connections to pool members are unevenly distributed. The load balancing method is Least Connections (member). Priority Group Activation is disabled. What is a potential cause of the uneven traffic distribution?
Antwort: C
Begründung:
In a BIG-IP environment, load balancing and persistence work together but serve different purposes. While a load balancing method likeLeast Connectionsattempts to distribute traffic based on current connection counts, apersistence profileoverrides this logic for returning clients.
* Persistence Overrides Load Balancing:When a persistence profile (such as Source Address or Cookie persistence) is applied to a Virtual Server, the BIG-IP system tracks which client was sent to which backend member.
* Sticky Sessions:If a client with a valid persistence record returns, the BIG-IP will send that client to the same pool memberit was previously assigned to, regardless of the load balancing algorithm's current preference.
* Uneven Distribution:If certain clients generate significantly more traffic or stay connected longer than others, the persistence table will "lock" those high-volume flows to specific members, resulting in an uneven distribution of connections across the pool.
38. Frage
When using the setup utility to configure a redundant pair, you are asked to provide a "Failover Peer IP".
Which address is this?
Antwort: D
Begründung:
When establishing a redundant pair, each device must know where to send its health heartbeats and sync data.
* The Peer IP: The Failover Peer IP is the IP address belonging to the other BIG-IP device in the HA pair. This is typically a34 Self-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."
39. Frage
A BIG-IP Administrator is informed that traffic on interface 1.1 is expected to increase beyond the maximum bandwidth capacity of the link. There is a single VLAN on the interface.
What should the BIG-IP Administrator do to increase the total available bandwidth? (Choose one answer)
Antwort: D
Begründung:
On BIG-IP systems, physical interface bandwidth is fixed by the link speed (for example, 1GbE or 10GbE).
When traffic demand exceeds the capacity of a single interface, BIG-IP provides link aggregation through trunks.
Key concepts involved:
* InterfacesA single physical interface (such as 1.1) is limited to its negotiated link speed. You cannot exceed this capacity through software tuning alone.
* Trunks (Link Aggregation)A trunk combines multiple physical interfaces into a single logical interface.
* BIG-IP supports LACP and static trunks.
* Traffic is distributed across member interfaces, increasing aggregate bandwidth and providing redundancy.
* VLANs are then assigned to the trunk, not directly to individual interfaces.
Why option B is correct:
* Creating a trunk with two interfaces allows BIG-IP to use both physical links simultaneously.
* This increases total available bandwidth (for example, two 10Gb interfaces # up to 20Gb aggregate capacity).
* This is the documented and supported method for scaling bandwidth on BIG-IP.
Why the other options are incorrect:
* A. Increase the MTUMTU changes affect packet size and efficiency, not total bandwidth capacity.
* C. Assign two interfaces to the VLANBIG-IP does not support assigning a VLAN to multiple interfaces directly. VLANs must be associated with one interface or one trunk.
* D. Set the media speed manuallyMedia speed can only be set up to the physical capability of the interface and connected switch port. It cannot exceed the hardware limit.
Conclusion:
To increase total available bandwidth on BIG-IP when a single interface is insufficient, the administrator must create a trunk object with multiple interfaces and move the VLAN onto the trunk. This aligns directly with BIG-IP data plane design and best practices.
40. Frage
The network architecture for a BIG-IP consists of an external VLAN and an internal VLAN with two interfaces connected to the upstream switch. The design requires fault tolerance in the case that one of the interfaces is down. Which deployment architecture meets these requirements? (Choose one answer)
Antwort: B
Begründung:
To meet the requirement of fault tolerance when one interface goes down, BIG-IP must use link aggregation so that loss of a single physical link does not isolate the VLAN(s).
How the objects relate (data plane view)
* Interfaces = physical links.
* Trunk (LACP) = bundles multiple interfaces into one logical link that provides redundancy (and possibly bandwidth aggregation).
* VLANs are assigned to interfaces or trunks. If you need multiple VLANs on the same trunk, they must use 802.1Q tagging (because you can only have one untagged VLAN per interface/trunk).
* Self IPs are then placed on the VLANs to provide BIG-IP presence and routing/ARP functions, but self IPs are not what provides link resiliency-the trunk does.
Why Option D is correct
* You have two physical interfaces and you want resiliency if one fails # put both interfaces into one trunk with LACP enabled.
* You need both external and internal VLANs on those same two links # both VLANs should be configured as tagged on that trunk, so they can coexist on the same aggregated link.
* If either physical interface fails, the trunk remains up via the remaining interface, keeping both VLANs operational.
Why the other options are incorrect
* A: Two VLANs cannot both be untagged on the same trunk/interface. Only one untagged VLAN is possible; additional VLANs must be tagged.
* B: Two trunks "each with one VLAN" would typically mean splitting VLANs across separate trunks.
With only two interfaces total, that becomes one interface per trunk-if one interface goes down, the VLAN on that interface is down (no redundancy for that VLAN).
* C: Same redundancy problem as B, and disabling LACP removes the negotiated aggregation behavior expected when the switch engineer specifically requested LACP.
41. Frage
Which two statements describe differences between the active and standby systems? (Choose two.)
Antwort: D,E
42. Frage
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