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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Data Plane Concepts |
| Exam Number: | F5CAB2 |
| Real Exam Qty: | 30 |
| Available Languages: | English |
| Related Certifications: | F5 Certified Administrator, BIG-IP (F5-CA) |
| Exam Duration: | 30 minutes |
| Exam Format: | Multiple Choice, Scenario-based |
| Exam Price: | $50 USD |
| Passing Score: | Pass/Fail (Scaled scoring, specific threshold not publicly disclosed per sub-exam) |
| Sample Questions: | F5 F5CAB2 Sample Questions |
| Exam Way: | Online (Pearson VUE) |
| Pre Condition: | None specified. It is one of five exams required for the F5 Certified Administrator, BIG-IP credential. |
| Official Syllabus URL: | https://education.f5.com/courses/1089 |
>> Reliable F5CAB2 Study Notes <<
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NEW QUESTION # 67
The BIG-IP Administrator disables all pool members in a pool. Users are still able to reach the pool members.
What is allowing users to continue to reach the disabled pool members?
Answer: C
NEW QUESTION # 68
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: C
Explanation:
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 # 69
A development team needs to apply a software fix and troubleshoot one of its servers. The BIG-IP Administrator needs to immediately remove all connections from the BIG-IP system to the back-end server. The BIG-IP Administrator checks the virtual server configuration and finds that a persistence profile is assigned to it.
What should the BIG-IP Administrator do to meet this requirement? (Choose one answer)
Answer: A
Explanation:
In BIG-IP traffic management, persistence profiles cause existing client connections (and subsequent requests) to be repeatedly sent to the same pool member. When persistence is enabled, simply preventing new connections is not sufficient if the requirement is to immediately remove all existing connections.
Key behavior of pool member states:
Forced Offline
Immediately removes the pool member from load balancing.
Terminates all existing connections, regardless of persistence.
Prevents new connections from being established.
This is the correct state when urgent maintenance or troubleshooting is required.
Disabled
Prevents new connections from being sent to the pool member.
Allows existing connections to continue, which is not acceptable when persistence is configured and connections must be cleared immediately.
Offline (non-forced)
Similar to Disabled behavior depending on context.
Does not guarantee immediate termination of existing connections.
Manually deleting connections via the command line
Is unnecessary and operationally inefficient.
BIG-IP already provides a supported mechanism (Forced Offline) to cleanly and immediately remove traffic.
Conclusion:
To immediately remove all existing connections, including those maintained by persistence, the BIG-IP Administrator must set the pool member to a Forced Offline state. This directly satisfies the requirement without additional manual steps.
NEW QUESTION # 70
A network administrator is planning to add a trunk to a single BIG-IP system. What does a trunk provide?
(Pick the 2 correct responses below)
Answer: B,D
Explanation:
In the F5 BIG-IP ecosystem, atrunkis a logical grouping of two or more physical interfaces that the system treats as a single data path. This configuration is based on the Link Aggregation Control Protocol (LACP) or static link aggregation.
Trunks provide two primary benefits to the data plane:
* Increased Bandwidth:By aggregating multiple physical interfaces (e.g., combining two 10Gbps interfaces), the aggregate throughput of the logical connection is increased. This allows the BIG-IP to handle higher traffic volumes than a single interface could support.
* Link Redundancy:Trunks provide high availability at the physical layer. If one physical interface within the trunk fails or the cable is disconnected, the BIG-IP system automatically redistributes traffic across the remaining active interfaces in the trunk. This prevents a single cable or port failure from causing a network outage.
Why the other options are incorrect:
* Option C:While VLAN tags are often usedontrunks, the ability to use tagged VLANs is a property of theVLANconfiguration and 802.1Q tagging, not the trunk itself. A single interface can support tagged VLANs without being part of a trunk.
* Option D:Trunks are agnostic to the type of application traffic (such as VoIP) passing through them.
They operate at Layer 2 to provide a reliable pipe for any Layer 3+ traffic.
NEW QUESTION # 71
Which virtual server type is being configured in the screenshot? (Choose one answer.)
Answer: B
Explanation:
The configuration shown matches a Performance Layer 4 virtual server because it is explicitly using a FastL4 profile:
The screenshot shows Protocol: TCP and Protocol Profile (Client): fastL4.
In BIG-IP data plane terms, FastL4 is the hallmark of a Performance (Layer 4) virtual server, designed to process connections at Layer 4 with minimal overhead (high throughput/low latency) compared to full proxy L7 processing.
The screenshot also shows HTTP Profile (Client): None (and HTTP server profile effectively not in use).
A Standard virtual server commonly uses full-proxy features and frequently includes L7 profiles (like HTTP) when doing HTTP-aware load balancing, header manipulation, cookie persistence, etc. In contrast, a Performance L4 virtual server typically does not use an HTTP profile because it is not doing HTTP-aware (Layer 7) processing.
It is not a Forwarding IP virtual server:
A Forwarding (IP) virtual server is used to route/forward packets (often without load balancing to pool members in the same way as Standard/Performance VS) and is selected by choosing a forwarding type. The presence of a TCP protocol with a FastL4 client profile aligns with a Layer 4 load-balancing style virtual server, not a packet-forwarding virtual server type.
Conclusion: Because the configuration is TCP-based and explicitly uses fastL4 with no HTTP profile, the expected BIG-IP virtual server type is Performance Layer 4 (Option C).
NEW QUESTION # 72
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