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This is the F5CAB2 PDF format which contains real F5CAB2 exam questions. You can print it and make a hard copy of this PDF file as well which helps you to prepare on the go. It comes in handy format and helps you prepare well with updated BIG-IP Administration Data Plane Concepts (F5CAB2) exam questions. Moreover, this PDF has questions that are according to the present content of the test. This PDF format helps you to enhance your understanding of each topic which you need to self-evaluate to boost your F5 F5CAB2 Exam Score.
NEW QUESTION # 14
A BIG-IP system receives a client connection destined to 1.0.0.10:8080. Multiple virtual servers are configured on the system. Which virtual server will process the connection? (Choose one answer)
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
BIG-IP uses a virtual server matching and precedence algorithm to determine which virtual server processes an incoming connection. This decision is made entirely in the data plane and is based on how specifically a virtual server matches the destination IP address and port.
BIG-IP Virtual Server Selection Rules (Simplified):
When multiple virtual servers could match a packet, BIG-IP selects the most specific match, using the following precedence:
Exact IP address and exact port
Exact IP address with wildcard port (port 0 / any)
Wildcard IP address with exact port
Wildcard IP address and wildcard port
Applying the Rules to This Scenario:
Incoming traffic destination: 1.0.0.10:8080
Option C: 1.0.0.10:8080
Exact IP match
Exact port match
Highest possible specificity
If the virtual server is available (green), it wins the match
Option B: 1.0.0.10:any
Exact IP match, but wildcard port
Lower priority than an exact IP + exact port match
Option D: 0.0.0.0:8080
Wildcard IP, exact port
Lower priority than an exact IP match
Option A: 0.0.0.0:any
Wildcard IP and wildcard port
Lowest priority, used only if no more specific virtual server exists
Final Determination:
Because a virtual server configured with destination 1.0.0.10:8080 exactly matches both the IP address and port of the incoming connection-and is available-it will always be selected to process the traffic.
Key Data Plane Concept Reinforced:
BIG-IP always processes traffic using the most specific matching virtual server. Exact destination IP and port matches take precedence over any wildcard or forwarding virtual server definitions.
NEW QUESTION # 15
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)
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 โ put both interfaces into one trunk with LACP enabled.
You need both external and internal VLANs on those same two links โ 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 # 16
An application is configured so that the same pool member must be used for an entire session, as well as for HTTP and FTP traffic. A user reports that a session has terminated, and the user must restart the session. The BIG-IP Administrator determines that the active BIG-IP device failed over to the standby BIG-IP device.
Which configuration settings should the BIG-IP Administrator verify to ensure proper behavior when BIG-IP failover occurs?
Answer: C
Explanation:
In this scenario, two specific High Availability and Persistence requirements must be met to ensure session continuity during a failover.
* Persistence Mirroring:By default, persistence records (which map a client to a specific server) exist only on the memory of the active BIG-IP. If a failover occurs, the standby unit has no knowledge of these sessions and will re-load-balance the client, likely to a different server. EnablingPersistence Mirroringensures that the persistence table is synchronized in real-time to the standby peer.
* Match Across Services:The requirement specifies that the session must persist across bothHTTPand FTP. These are different Virtual Servers (and likely different ports). TheMatch Across Servicessetting in the persistence profile allows the BIG-IP to use the same persistence record for any Virtual Server that shares the same IP address and pool, regardless of the service port.
NEW QUESTION # 17
A BIG-IP system receives UDP traffic from a specific source. The administrator wants the traffic to be forwarded, not dropped or rejected. Which virtual server type should be used? (Choose one answer)
Answer: B
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
BIG-IP virtual server types define how traffic is handled at the data plane when it matches a virtual server's destination address and service port.
According to BIG-IP Administration Data Plane Concepts:
Standard virtual server
The default and most commonly used type
Accepts client connections and forwards traffic to pool members
Supports both TCP and UDP traffic
Allows full use of profiles (UDP, FastL4, persistence, etc.) and iRules Required when the goal is to process and pass traffic through BIG-IP Drop virtual server Silently discards matching traffic No response is sent to the client Reject virtual server Actively rejects traffic by sending an error response For UDP, BIG-IP may send an ICMP unreachable message Block virtual server Used to block traffic at the virtual server level Traffic is neither forwarded nor processed by pools In this scenario:
The administrator explicitly wants the UDP traffic to be forwarded
Only a Standard virtual server forwards traffic to a pool or next-hop destination Why the Other Options Are Incorrect:
A . Drop - Traffic is silently discarded
B . Reject - Traffic is actively rejected
C . Block - Traffic is blocked and not forwarded
Key Data Plane Concept Reinforced:
When traffic must be accepted and forwarded-regardless of whether it is TCP or UDP-the BIG-IP administrator must use a Standard virtual server, which is the only virtual server type designed for normal application traffic processing.
NEW QUESTION # 18
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:
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 # 19
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