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[General] New F5CAB2 Test Simulator - F5CAB2 Test Study Guide

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【General】 New F5CAB2 Test Simulator - F5CAB2 Test Study Guide

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F5 F5CAB2 Exam Syllabus Topics:
TopicDetails
Topic 1
  • Explain the relationship between interfaces, trunks, VLANs, self-IPs, routes and 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
  • Explain high availability (HA) concepts: This domain addresses HA concepts including integrity methods, implementation approaches, and advantages of high availability configurations.
Topic 3
  • Identify the different virtual server types: This domain covers BIG-IP virtual server types: Standard, Forwarding, Stateless, Reject, Performance Layer 4, and Performance HTTP.
Topic 4
  • 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.
Topic 5
  • Define ADC application objects: This domain covers ADC basics including application objects, load balancing methods, server selection, and key ADC features and benefits.

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F5 BIG-IP Administration Data Plane Concepts (F5CAB2) Sample Questions (Q43-Q48):NEW QUESTION # 43
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)
  • A. A Trunk containing an interface connected to each switch.
  • B. A virtual server with an LACP profile and the switches' management IPs as pool members.
  • C. A virtual server with an LACP profile and the interfaces connected to the switches as pool members.
  • D. A Trunk listing the allowed VLAN IDs and MAC addresses configured on the switches.
Answer: A
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
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 # 44
A BIG-IP Administrator assigns the default HTTP health monitor to a pool that has three members listening on port 80. When the administrator connects to each pool member using the curl utility, two of the members respond with a status of 404 Not Found, while the third responds with 200 OK. What will the pool show for member availability? (Choose one answer)
  • A. All members online
  • B. All members offline
  • C. Two members offline and one member online
  • D. Two members online and one member offline
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
In BIG-IP LTM, pool member availability is determined by health monitors, which continuously test application responsiveness and correctness.
For the default HTTP monitor, the behavior is defined as follows:
BIG-IP sends an HTTP request (by default, GET /)
The monitor expects a response with HTTP status 200 OK
Any HTTP response code other than 200 is considered a monitor failure
A failed monitor causes the associated pool member to be marked offline (down) Applying this to the scenario:
Two pool members return 404 Not Found
A 404 response indicates the requested object is missing
This response does not satisfy the success criteria of the default HTTP monitor BIG-IP marks these two members as offline One pool member returns 200 OK This matches the expected response code BIG-IP marks this member as online Resulting Pool Status:
2 members: Offline
1 member: Online
Why the Other Options Are Incorrect:
B - Members returning 404 responses cannot be considered healthy
C - At least one member responds with 200 OK, so the entire pool is not offline D - Not all members meet the monitor success criteria Key Data Plane Concept Reinforced:
BIG-IP health monitors validate not just reachability, but application correctness. For HTTP monitors, the response code is critical-404 is treated as a failure, even though the service is reachable.

NEW QUESTION # 45
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)
  • A. Two network trunks each with one VLAN and LACP enabled, and both VLANs configured as tagged
  • B. One network trunk with both VLANs and LACP enabled, and both VLANs configured as tagged
  • C. Two network trunks each with one VLAN and LACP disabled, and one VLAN configured as tagged and one VLAN configured as untagged
  • D. One network trunk with both VLANs and LACP enabled, and both VLANs configured as untagged
Answer: B
Explanation:
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.

NEW QUESTION # 46
An organization needs to deploy an HTTP application on a BIG-IP system. The requirements specify hardware acceleration to enhance performance, while HTTP optimization features are not required.
What type of virtual server and associated protocol profile should be used to meet these requirements?
(Choose one answer)
  • A. Type: Performance (Layer 4) Protocol Profile: fastL4
  • B. Type: Performance (HTTP) Protocol Profile: fasthttp
  • C. Type: Standard Protocol Profile: tcp-wan-optimized
  • D. Type: Stateless Protocol Profile: fastL4
Answer: A
Explanation:
To select the correct virtual server type, an administrator must balance the need for L7 intelligence versus raw throughput and hardware offloading:
* Performance (Layer 4) Virtual Server: This type is designed for maximum speed. It uses the fastL4 profile, which allows the BIG-IP system to leverage the ePVA (Embedded Packet Velocity Accelerator) hardware chip. When a Performance (L4) virtual server is used, the system processes packets at the network layer (L4) without looking into the application payload (L7). This fulfills the requirement for hardware acceleration and avoids the overhead of HTTP optimization features, which are not needed in this scenario.
* Performance (HTTP) Virtual Server: While fast, this type uses the fasthttp profile to provide some L7 awareness and optimization (like header insertion or small-scale multiplexing). Since the requirement specifically states HTTP optimization is not required, the L4 variant is more efficient.
* Standard Virtual Server: This is a full-proxy type. While it offers the most features (SSL offload, iRules, Compression), it processes traffic primarily in the TMOS software layer (or via high-level hardware assistance), which is "slower" than the pure hardware switching path of the Performance (L4) type.
* Stateless Virtual Server: This is typically used for specific UDP/ICMP traffic where the system does not need to maintain a connection table. It is not appropriate for standard HTTP (TCP) applications requiring persistent sessions or stateful load balancing.
By choosing Performance (Layer 4) with the fastL4 profile, the organization ensures that the traffic is handled by the hardware acceleration chips, providing the lowest latency and highest throughput possible for their HTTP application.

NEW QUESTION # 47
What type of virtual server will have a destination IP address of 0.0.0.0 and listen on a specific VLAN for requests?
  • A. Forwarding (IP)
  • B. Forwarding (Layer 2)
  • C. Wildcard
  • D. Standard
Answer: C
Explanation:
In BIG-IP LTM, aWildcardvirtual server is defined by using a destination IP address of 0.0.0.0. These virtual servers are designed to handle traffic that does not match any more specific Virtual Server destination address.
* 0.0.0.0 Destination:This address acts as a "catch-all" for IP traffic.
* VLAN Specificity:While the destination address is generic, a Wildcard virtual server is typically restricted to a specificVLAN(such as the Internal VLAN) to process outbound traffic from backend servers.
* Service Ports:A wildcard virtual server can be configured for a specific port (e.g., 0.0.0.0:80) or for all ports (0.0.0.0:0).
* Data Plane Usage:It is commonly used for transparently intercepting outbound traffic for the purpose of Source NAT (SNAT), bandwidth shaping, or directing traffic to a gateway pool.

NEW QUESTION # 48
......
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