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For the BIG-IP Administration Data Plane Configuration (F5CAB3) web-based practice exam no special software installation is required. Because it is a browser-based BIG-IP Administration Data Plane Configuration (F5CAB3) practice test. The web-based BIG-IP Administration Data Plane Configuration (F5CAB3) practice exam works on all operating systems like Mac, Linux, iOS, Android, and Windows.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Health Monitors and Persistence | 20-25% | - Persistence profiles (Cookie, Source Address, Universal) - OneConnect and connection multiplexing - Fallback host and persistence TTL - Monitor assignment and interval settings - Monitor types and configurations |
| Topic 2: Virtual Servers and Pools | 25-30% | - Priority group activation - Virtual server configuration options - Pool configuration and members - Node and pool management - Load balancing algorithms - Virtual server types (Standard, Forwarding, Performance L4, Regex) - Address translation and port translation |
| Topic 3: SSL/TLS Configuration | 15-20% | - Cipher groups and compatibility - SSL termination and re-encryption - Certificate validation settings - SSL profiles (Client and Server) - Certificate and key management |
| Topic 4: LTM Fundamentals | 15-20% | - License and provisioning modules - Configuration architecture and files - Traffic Management Shell (tmsh) CLI - Licensing types - Objects and their relationships |
| Topic 5: Traffic Management Features | 15-20% | - HTTP profile settings - OneConnect - NAT and SNAT concepts - Compression and caching profiles - Connection limits and rate shaping - iRules basics and events |
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NEW QUESTION # 61
In a pool there are 2 pool members out of the 5 members that are older servers. The number of connections these can handle is less than the other 3 pool members. Which load balancing method would allow more traffic to be directed to the newer servers? (Choose one answer)
Answer: C
Explanation:
When a pool contains servers with heterogeneous hardware capabilities (differing CPU, RAM, or connection limits), a static load balancing method like Round Robin is ineffective because it distributes requests equally, regardless of the server's capacity. To optimize traffic distribution for newer, more powerful servers, a dynamic or weighted method is required.
* Weighted Least Connections (member): This is the ideal method for this scenario. It combines two factors:
* Least Connections: It first checks the current active connection count to ensure traffic goes to the least busy server.
* Weight (Ratio): It allows the administrator to assign a "Ratio" value to each pool member. Newer servers can be assigned a higher ratio (e.g., 3) while older servers are assigned a lower ratio (e.g.,
1). The BIG-IP system uses these weights to disproportionately favor the newer servers even when connection counts are similar.
* Why other options are incorrect:
* Global Availability: This is primarily a GSLB (Global Server Load Balancing) or specific LTM priority group concept where traffic is sent to the first available member in a list until it fails, then moves to the next. It does not load balance based on capacity.
* Round Robin: This passes each new connection request to the next server in line, treating the old and new servers exactly the same.
* Least Connections (member): While this sends traffic to the server with the fewest active connections, it assumes all servers are equal. If an old server and a new server both have 10 connections, they are treated as equally capable of taking the 11th, which is not true in this scenario.
NEW QUESTION # 62
A Standard Virtual Server for a web application is configured with Automap for the Source Address Translation option. The original source address of the client must be known by the backend servers. What should the BIG-IP Administrator configure to meet this requirement?
Answer: C
Explanation:
SNAT Automap is a common configuration that replaces the client's original source IP address with one of the BIG-IP's self IP addresses. This ensures that the backend servers send return traffic back through the BIG- IP, which is necessary for the ADC to process the traffic correctly. However, a side effect of SNAT is that the backend servers only see the BIG-IP's IP in their logs, losing visibility into the true identity of the client.
To resolve this while still using SNAT for routing purposes, the administrator must configure the BIG-IP to
"pass" the client's IP address at the application layer. This is achieved by using an HTTP Profile with the Insert X-Forwarded-For setting enabled. When this profile is applied to the Virtual Server, the BIG-IP intercepts the HTTP request, adds a header (X-Forwarded-For) containing the client's original IP, and then forwards the modified request to the server. The backend web server can then be configured to read this header and log the original client IP instead of the BIG-IP's SNAT address.
Other options are incorrect for this requirement. Performance (HTTP) (Option A) is a virtual server type optimized for speed but often lacks the full Layer 7 header manipulation capabilities of a Standard Virtual Server. SNAT Pool with the client IP (Option C) is technically impossible as SNAT pools use static, pre- defined IPs. There is no such thing as an HTTP Transparent profile (Option D) in standard BIG-IP administration for this purpose. The X-Forwarded-For header insertion within the HTTP profile is the standard procedural method for maintaining client visibility in SNAT-enabled environments.
NEW QUESTION # 63
The BIG-IP Administrator is investigating whether better TCP performance is possible for a virtual server.
Which built-in profile should be tried first? (Choose one answer)
Answer: B
Explanation:
BIG-IP provides several built-in TCP profiles optimized for different traffic patterns and network conditions. When attempting to improve general TCP performance, the recommended starting point is f5-tcp-progressive.
According to the BIG-IP Administration: Data Plane Configuration documentation:
f5-tcp-progressive is designed as a balanced, general-purpose TCP optimization profile.
It dynamically adjusts TCP behavior to improve throughput and latency for most enterprise applications.
It is the recommended first-choice profile when tuning TCP performance before moving to more specialized profiles.
Why the other options are incorrect:
A . f5-tcp-legacy
This profile exists for backward compatibility and does not include modern TCP optimizations.
C . f5-tcp-mobile
This profile is optimized specifically for high-latency, lossy mobile networks and is not suitable for general-purpose environments.
D . No option
BIG-IP explicitly provides built-in TCP profiles for performance tuning; using none would forgo optimization opportunities.
Correct Resolution:
The administrator should first apply f5-tcp-progressive to evaluate potential TCP performance improvements before considering more specialized profiles.
NEW QUESTION # 64
A BIG-IP Administrator creates a new Virtual Server. The end user is unable to access the page. During troubleshooting, the administrator learns that the connection between the BIG-IP system and server is NOT set up correctly. What should the administrator do to solve this issue? (Choose one answer)
Answer: C
Explanation:
The issue described is a classic symptom of asymmetric routing, which frequently occurs when the BIG-IP system and the back-end servers reside on the same subnet (often referred to as a "one-arm" deployment).
The Routing Problem: By default, the BIG-IP system preserves the original client source IP address when forwarding traffic to a pool member. If the server is in the same subnet as the client or if the server's default gateway is not the BIG-IP, the server will attempt to send its response directly back to the client's IP address, bypassing the BIG-IP.
Stateful Failure: Since the BIG-IP is a Full Proxy, it maintains a state table. Because the response packet never returns through the BIG-IP, the system cannot complete the three-way handshake or manage the application session, resulting in a connection failure for the user.
The Solution (SNAT): Enabling Source Network Address Translation (SNAT) solves this by changing the source IP address of the request to an IP address owned by the BIG-IP (typically a self-IP).
Requirement for Subnet Alignment: To ensure the server sends the response back to the BIG-IP, the translation address must be reachable. By using a self-IP configured in the same subnet as the servers, the BIG-IP ensures that the server sees the request coming from a local "neighbor." The server will then naturally send the response back to that self-IP, allowing the BIG-IP to translate the packet back and forward it to the client.
Why other options are incorrect:
A: Disabling address translation would ensure the server-side traffic uses the client IP, making asymmetric routing inevitable in this scenario.
B: This is technically contradictory; "Auto Map" specifically uses existing self-IPs and does not require or use a "SNAT pool" configuration.
C: While using a specific translation address can work, it does not inherently guarantee the Layer 2/Layer 3 reachability mentioned in the scenario as effectively as ensuring the self-IP is correctly placed in the server's subnet.
NEW QUESTION # 65
A BIG-IP Administrator uses backend servers to host multiple services per server. There are multiple virtual servers and pools defined, referencing the same backend servers.
Which load balancing algorithm is most appropriate to have an equal number of connections on each backend server?
Answer: A
Explanation:
Least Connections (node) balances connections across the physical server regardless of how many services or pool members exist on that node.
NEW QUESTION # 66
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