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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Data Plane Concepts |
| Exam Number: | F5CAB2 |
| Exam Format: | Scenario-based, Multiple choice |
| Available Languages: | English |
| Exam Duration: | 30 minutes |
| Related Certifications: | F5 Certified Administrator, BIG-IP |
| Certificate Validity Period: | 3 years |
| Passing Score: | Not officially disclosed |
| Real Exam Qty: | 30 |
| Exam Price: | $50 USD |
| Recommended Training: | BIG-IP Administration Training Courses |
| Exam Registration: | F5 Education Portal Pearson VUE 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 # 22
A BIG-IP Administrator is making adjustments to an iRule and needs to identify which of the 235 virtual server configured on the BIG-IP device will be affected. How should the administrator obtain this information in an effective way? (Choose one answer)
Answer: B
Explanation:
In a large-scale BIG-IP environment with hundreds of virtual servers, the Network Map is the most effective tool for visualizing and auditing the relationships between various ADC objects.
* The Network Map Functionality: The Network Map provides a hierarchical view of the local traffic objects. It allows an administrator to see the status and dependencies of Virtual Servers, Pools, Pool Members, and associated iRules all in one screen.
* Search and Filter: By navigating to Local Traffic > Network Map, the administrator can use the Advanced Filter. This feature allows for searching specifically for an iRule name or a string within an iRule definition. Once the filter is applied, the system displays only the Virtual Servers that are associated with that specific iRule.
* Efficiency: While the "Virtual Server List" (Option D) can be customized to show columns for iRules, it is often cumbersome to scroll through hundreds of entries. The "iRules List" (Option B) displays the scripts themselves but does not provide a reverse-lookup list of all associated virtual servers in a single view as efficiently as the Network Map.
* Summary of Relationships: The Network Map is specifically designed to answer the question, "What is this object connected to?" making it the primary administrative interface for impact analysis during configuration changes.
NEW QUESTION # 23
A BIG-IP Administrator configures remote authentication and needs to ensure that users can still log in even when the remote authentication server is unavailable. Which action should the BIG-IP Administrator take in the remote authentication configuration to meet this requirement? (Choose one answer)
Answer: A
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
Although remote authentication (LDAP, RADIUS, TACACS+) is a control-plane / management-plane feature, it directly affects availability and resiliency of administrative access, which is a critical operational HA consideration.
How BIG-IP Remote Authentication Works:
BIG-IP can authenticate administrators against:
LDAP
RADIUS
TACACS+
When remote authentication is enabled, BIG-IP by default relies on the remote server for user authentication If the remote authentication server becomes unreachable, administrators may be locked out unless fallback is configured Why "Fallback to Local" Is Required:
The Fallback to Local option allows BIG-IP to:
Attempt authentication against the remote authentication server first
If the remote server is unreachable or unavailable, fall back to:
Local BIG-IP user accounts (admin, or other locally defined users)
This ensures:
Continuous administrative access
Safe recovery during:
Network outages
Authentication server failures
Maintenance windows
This behavior is explicitly recommended as a best practice in BIG-IP administration to avoid loss of management access.
Why the Other Options Are Incorrect:
A . Configure a second remote user directory
Provides redundancy only if both directories are reachable
Does not help if remote authentication as a whole is unavailable
B . Configure a remote role group
Maps remote users to BIG-IP roles
Does not affect authentication availability
D . Set partition access to "All"
Controls authorization scope after login
Has no impact on authentication success
Key Availability Concept Reinforced:
To maintain administrative access resiliency, BIG-IP administrators should always enable Fallback to Local when using remote authentication. This prevents lockouts and ensures access even during authentication infrastructure failures.
NEW QUESTION # 24
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)
Answer: B
Explanation:
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.
NEW QUESTION # 25
A BIG-IP Administrator configures remote authentication and needs to make sure that users can still login even when the remote authentication server is unavailable. Which action should the BIG-IP Administrator take in the remote authentication configuration to meet this requirement?
Answer: A
Explanation:
The BIG-IP system supports various remote authentication methods like LDAP, Active Directory, and RADIUS.
* Fallback to Local:This is a specific security and availability feature within theSystem > Users > Authenticationconfiguration.
* Redundancy:When "Fallback to Local" is enabled, the BIG-IP will first attempt to authenticate a user against the configured remote server. If that remote server is unreachable or fails to respond, the system will then check its internalLocal User databasefor credentials.
* Administrative Access:This is standard practice for the "admin" or emergency accounts to ensure the system remains accessible even if the corporate directory service (e.g., AD) is offline.
NEW QUESTION # 26
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 distribution? (Choose one answer)
Answer: A
Explanation:
With Least Connections (member), BIG-IP attempts to send new connections to the pool member with the fewest current connections. In a perfectly "stateless" scenario (no affinity), this often trends toward a fairly even distribution over time.
However, persistence overrides load balancing:
* When a persistence profile is applied, BIG-IP will continue sending a client (or client group) to the same pool member based on the persistence record (cookie / source address / SSL session ID, etc.).
* This means even if another pool member has fewer connections, BIG-IP may still select the persisted member to honor session affinity.
* The result can be uneven active connection counts, even though the configured load balancing method is Least Connections.
Why the other options are not the best cause:
* A. Priority Group Activation is disabledPriority Group Activation only affects selection when priority groups are configured; disabling it does not inherently create uneven distribution under Least Connections.
* B. SSL Profile Server is appliedA server-side SSL profile affects encryption to pool members, but it does not by itself cause skewed selection across pool members. (Skew could happen indirectly if members have different performance/latency, but that's not the primary, expected exam answer.)
* D. Incorrect load balancing methodLeast Connections is a valid method and does not itself explain unevenness unless something is overriding it (like persistence) or pool members are not all eligible.
Conclusion:
A persistence profile is the most common and expected reason that active connections become unevenly distributed, because persistence takes precedence over the Least Connections load-balancing decision.
NEW QUESTION # 27
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