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F5 F5CAB2 Exam Syllabus Topics:

TopicDetails
Topic 1
  • their status
  • statistics: This domain covers BIG-IP networking components including interfaces, trunks, VLANs, self-IPs, and routes, their dependencies and status, plus predicting traffic paths and egress IPs.
Topic 2
  • Define ADC application objects: This domain covers ADC basics including application objects, load balancing methods, server selection, and key ADC features and benefits.
Topic 3
  • Determine expected traffic behavior based on configuration: This domain focuses on predicting traffic behavior based on persistence, processing order, object status, egress IPs, and connection
  • rate limits.

>> F5CAB2 Exam Flashcards <<

Free PDF Quiz 2026 F5 F5CAB2: BIG-IP Administration Data Plane Concepts (F5CAB2) High Hit-Rate Exam Flashcards

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F5 BIG-IP Administration Data Plane Concepts (F5CAB2) Sample Questions (Q12-Q17):

NEW QUESTION # 12
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 # 13
What is required for a virtual server to support clients whose traffic arrives on the internal VLAN and pool members whose traffic arrives on the external VLAN?

Answer: D

Explanation:
4647
Virtual Servers have a setting called VLAN and Tunnel Traffic which defines where the BIG-IP "listens" for new connections.4849
* Ingress Logic: A virtual server is an entry point. It must be enab50led on the VLAN where the Client resides. If a client is on the "51Internal" VLAN, the Virtual Server must be enabled there to receive the traffic.
* Egress Logic: The BIG-IP system uses the TMM Routing Table and Self-IPs to reach pool members.
It does not need the Virtual Server to be "enabled" on the destination VLAN (External) to send traffic there.
* Default Behavior: By default, Virtual Servers are enabled on "All VLANs." However, if restricted for security, the administrator must ensure the Virtual Server is active on the client-facing (ingress) VLAN.


NEW QUESTION # 14
Which three iRule events are likely to be seen in iRules designed to select a pool for load balancing? (Choose three.)

Answer: B,D,F

Explanation:
12
In the BIG-IP system, pool selection must occur on the client-side of the connection, before the system attempts to connect to a pool 3member. The events listed 4are the primary entry points for making these decisions:
* CLIENT_ACCEPTED (E): This is a Layer 4 event triggered when the BIG-IP accepts a TCP connection. It is the earliest point where a pool can be assigned based on the client's source IP address or the destination port.
* CLIENT_DATA (A): This event is triggered when the system receives a "chunk" of data on the client- side. It is often used for non-HTTP protocols (like custom TCP protocols) to inspect the payload and select a pool based on its contents.
* HTTP_REQUEST (C): This is a Layer 7 event. It occurs once the BIG-IP has fully parsed the HTTP headers. This is the most common event for pool selection, allowing the administrator to route traffic based on the URI, Host header, or cookies.
Events like SERVER_SELECTED or SERVER_CONNECTED occur after the load balancing decision has already been made, and HTTP_RESPONSE or SERVER_DATA occur after the server has already started communicating back, making them too late for initial pool selection.


NEW QUESTION # 15
Which statement is true concerning cookie persistence?

Answer: C


NEW QUESTION # 16
A BIG-IP Administrator needs to connect a BIG-IP system to two upstream switches to provide external network resilience. The network engineer instructs the administrator to configure interface binding with LACP. Which configuration should the administrator use? (Choose one answer)

Answer: B

Explanation:
In BIG-IP architecture, link aggregation and redundancy at Layer 2 are implemented using Trunks, not virtual servers or pools.
According to BIG-IP Administration Data Plane Concepts:
* Interfaces are the physical network ports on the BIG-IP device
* A Trunk is a logical grouping of multiple interfaces
* Trunks can be configured to use LACP (Link Aggregation Control Protocol) to:
* Provide link redundancy
* Increase aggregate bandwidth
* Allow automatic detection of link failures
* VLANs are then assigned to the trunk, not directly to individual interfaces, once aggregation is in place Correct Design for the Scenario:
To connect BIG-IP to two upstream switches with LACP:
* One physical interface from BIG-IP connects to Switch A
* Another physical interface from BIG-IP connects to Switch B
* Both interfaces are placed into the same trunk
* LACP is enabled on the trunk and on the switches
This configuration allows:
* Traffic to continue flowing if one interface or switch fails
* Proper LACP negotiation between BIG-IP and the upstream switches
* Clean separation of responsibilities (Layer 2 handled by trunking, Layer 4-7 by virtual servers) Why Option D Is Correct:
* A Trunk containing an interface connected to each switch is exactly how BIG-IP implements LACP- based interface binding
* The trunk handles link state, load distribution, and failover at the data plane Why the Other Options Are Incorrect:
* A & B - Virtual servers operate at Layers 4-7 and have nothing to do with physical link aggregation or LACP
* C - VLAN IDs and MAC addresses are not configured inside a trunk definition; trunks aggregate interfaces, and VLANs are applied to trunks Key Data Plane Concept Reinforced:
On BIG-IP systems, LACP is always configured on a Trunk, which aggregates physical interfaces to provide Layer 2 resiliency and bandwidth aggregation. Virtual servers and pools are not involved in physical interface binding.


NEW QUESTION # 17
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