Title: BIG-IP Administration Data Plane Concepts (F5CAB2) sure pass guide & F5CAB2 [Print This Page] Author: kengray343 Time: 10 hour before Title: BIG-IP Administration Data Plane Concepts (F5CAB2) sure pass guide & F5CAB2 We provide up-to-date BIG-IP Administration Data Plane Concepts (F5CAB2) (F5CAB2) exam questions and study materials in three different formats. We have developed three variations of authentic F5 F5CAB2 exam questions to cater to different learning preferences, ensuring that all candidates can effectively prepare for the F5CAB2 Practice Test. PracticeMaterial offers BIG-IP Administration Data Plane Concepts (F5CAB2) (F5CAB2) practice questions in PDF format, browser-based practice exams, and desktop practice test software.
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An ecommerce company is experiencing latency issues with online shops during Black Friday's peak season.
The BIG-IP Administrator detects an overall high CPU load on the BIG-IP device and wants to move the top utilized Virtual Servers to a dedicated BIG-IP device. Where should the BIG-IP Administrator determine the problematic Virtual Servers? (Choose one answer)
A. Local Traffic > Virtual Servers > Virtual Server List
B. Local Traffic > Network Map
C. Statistics > Module Statistics > Local Traffic > Virtual Servers
D. System > Platform
Answer: C
Explanation:
When troubleshooting performance and latency issues on BIG-IP, especially under peak load conditions, it is critical to identify which Virtual Servers are consuming the most resources. This is a core data plane analysis task.
BIG-IP provides multiple views of configuration and status, but only certain areas expose real-time and historical traffic statistics that correlate directly with CPU usage and throughput.
Why Option C Is Correct:
Statistics > Module Statistics > Local Traffic > Virtual Servers provides:
* Real-time and cumulative statistics per Virtual Server
* Metrics such as:
* Bits in / Bits out
* Packets in / Packets out
* Current connections
* Connection rate
* Total requests
* The ability to identify high-traffic or high-connection Virtual Servers, which are the most likely contributors to elevated CPU utilization These statistics allow the administrator to objectively determine which Virtual Servers are the top consumers of system resources and therefore good candidates for migration to a dedicated BIG-IP device.
Why the Other Options Are Incorrect:
* A. Local Traffic > Virtual Servers > Virtual Server List
* Primarily a configuration view
* Does not provide sufficient performance or utilization statistics to identify CPU-heavy Virtual Servers
* B. System > Platform
* Displays hardware-level information such as CPU cores, memory, disk, and platform type
* Does not break down utilization by Virtual Server
* D. Local Traffic > Network Map
* Provides a logical topology view of Virtual Servers, pools, and pool members
* Useful for understanding relationships, but not for identifying high-utilization Virtual Servers Key Data Plane Concept Reinforced:
To diagnose performance problems and plan traffic redistribution, BIG-IP administrators must rely on Module and object-level statistics, not configuration screens. The Virtual Server statistics view is the authoritative location for identifying traffic hotspots that directly impact CPU and latency during peak events such as Black Friday.
NEW QUESTION # 38
Which statement is true concerning cookie persistence?
A. Cookie persistence allows persistence independent of IP addresses.
B. Cookie persistence uses a cookie that stores the virtual server, pool name, and member IP address in clear text.
C. If a client's browser accepts cookies, cookie persistence will always cause a cookie to be written to the client's file system.
D. Cookie persistence allows persistence even if the data are encrypted from client to pool member.
Answer: A
Explanation:
Cookie Persistence is a Layer 7 persistence method that leverages an HTTP cookie to track a user session.
* IP Independence: Unlike "Source Address Affinity" (which relies on the client's IP), Cookie persistence identifies the session base16d on a unique token provided by the BIG-IP system. This is crucial for environments where many users share a single gateway (NAT) or where a client's IP might change mid-session.
* Encryption and Decryption: For the BIG-IP to insert or read a cookie, it must be able to see the HTTP header. If the traffic is encrypted end-to-end (SSL Pass-through), the BIG-IP cannot use cookie persistence. SSL must be terminated at the BIG-IP (Option B is false).
* Security: By default, BIG-IP cookies are encoded, not clear text. Modern versions allow for easy encryption of these cookies to prevent information leakage (Option C is false).
* Memory vs. Disk: The default behavior is "session-based" (In-memory). A cookie is only written to the client's file system (disk) if an Expiration is configured in the persistence profile (Option D is false).
NEW QUESTION # 39
Which of the following lists the order of preference from most preferred to least preferred when BIG-IP processes and selects a virtual server? (Choose one answer)
A. Destination host address ¡ú Source host address ¡ú Service port
B. Service port ¡ú Destination host address ¡ú Source host address
C. Source host address ¡ú Service port ¡ú Destination host address
Answer: A
Explanation:
The BIG-IP system uses a specific precedence algorithm to determine which virtual server (listener) should process an incoming packet when multiple virtual servers might match the criteria. Since BIG-IP version 11.3.0, the system evaluates three primary factors in a fixed order of importance:
Destination Address: The system first looks for the most specific destination match. A "Host" address (mask /32) is preferred over a "Network" address (mask /24, /16, etc.), which is preferred over a "Wildcard" (0.0.0.0/0).
Source Address: If multiple virtual servers have identical destination masks, the system then evaluates the source address criteria. Again, a specific source host match is preferred over a source network or a wildcard source.
Service Port: Finally, if both destination and source specifications are equal, the system checks the port. A specific port match (e.g., 80) is preferred over a wildcard port (e.g., or 0).
Following this logic, a virtual server configured with a specific destination host, a specific source host, and a specific service port represents the highest level of specificity and thus the highest preference.
NEW QUESTION # 40
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)
A. Drop
B. Block
C. Standard
D. Reject
Answer: C
Explanation:
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 # 41
A virtual server is listening at 10.10.1.100:80 and has the following iRule associated with it:
when HTTP_REQUEST { if { [HTTP::header UserAgent] contains "MSIE" }
{ pool MSIE_pool }
else { pool Mozilla_pool }
If
a user connects to http://10.10.1.100/foo.html and their browser does not specify a UserAgent, which pool will receive the request?
A. Unknown. The pool cannot be determined from the information provided.
B. None. The request will be dropped.
C. MSIE_pool
D. Mozilla_pool
Answer: D
NEW QUESTION # 42
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