F5CAB3関連問題資料 & F5CAB3出題範囲

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F5 F5CAB3 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Apply procedural concepts required to modify and manage pools: This domain addresses managing server pools including health monitors, load balancing methods, priority groups, and service port configurations.
トピック 2	Apply procedural concepts required to modify and manage virtual servers: This domain covers managing virtual servers including applying persistence, encryption, and protocol profiles, identifying iApp objects, reporting iRules, and showing pool configurations.

>> F5CAB3関連問題資料 <<

F5 F5CAB3出題範囲 & F5CAB3関連試験

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F5 BIG-IP Administration Data Plane Configuration 認定 F5CAB3 試験問題 (Q83-Q88):

質問 # 83
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? (Choose one answer)

A. Predictive (member)
B. Least Connections (node)
C. Predictive (node)
D. Least Connections (member)

正解：B

解説：
In this scenario, each backend node (server) hosts multiple services and is referenced by multiple pools and virtual servers. The goal is to ensure an equal number of total connections per backend server, regardless of how many pool members (services/ports) exist on that server.
According to the BIG-IP Administration: Data Plane Configuration documentation:
* Least Connections (node) tracks the total number of active connections to a node across all pool members and services.
* This algorithm ensures load distribution is balanced at the server level, not just at the individual service (member) level.
* It is specifically recommended when:
* Multiple pool members exist on the same backend server
* Multiple virtual servers reference the same backend servers
Why the other options are incorrect:
* B. Predictive (member)Predictive algorithms are advanced and traffic-pattern based, but they operate at the member level and do not guarantee equal connections per server.
* C. Least Connections (member)This balances connections per pool member, which can overload a server hosting multiple members while still appearing "balanced" per member.
* D. Predictive (node)Although node-aware, predictive algorithms are less deterministic and not the best choice when strict equality of connections is required.
Correct Resolution:
Using Least Connections (node) ensures that each backend server carries an equal connection load across all services and pools.

質問 # 84
A Virtual Server uses an iRule to send traffic to pool members depending on the URI. The BIG-IP Administrator needs to modify the pool member in the iRule.
Which event declaration does the BIG-IP Administrator need to change to accomplish this?

A. SERVER_CONNECTED
B. HTTP_REQUEST
C. HTTP_RESPONSE
D. CLIENT_ACCEPTED

正解：B

解説：
URI-based traffic steering requires inspection of the HTTP request. BIG-IP processes HTTP headers and URIs in the HTTP_REQUEST event. Pool member selection based on URI must occur before the request is sent to the server, making HTTP_REQUEST the correct event.

質問 # 85
Refer to the exhibit.

A BIG-IP Administrator creates a new Virtual Server to load balance SSH traffic. Users are unable to log on to the servers.
What should the BIG-IP Administrator do to resolve the issue?

A. Set Destination Addresses/Mask to 0.0.0.0/0
B. Set Protocol to UDP
C. Set HTTP Profile to None
D. Set Source Address to 10.1.1.2

正解：C

解説：
The virtual server is intended to process SSH traffic on TCP port 22 , but the exhibit shows that the standard
http HTTP profile is assigned. This is the configuration error. An HTTP profile enables BIG-IP Layer 7 HTTP processing and is appropriate only when the virtual server is expected to process HTTP protocol traffic.
F5 documentation defines its purpose directly: "An HTTP profile defines the way that you want the BIG- IP system to manage HTTP traffic." SSH is not HTTP. It is an independent application protocol transported over TCP , conventionally using port
22 . Therefore, an ordinary SSH load-balancing virtual server should retain the TCP protocol/profile while having HTTP Profile set to None . F5 ' s SSH virtual-server configuration guidance specifically uses service port 22 for SSH and does not require an HTTP profile.
Options B, C, and D do not address the fault. The destination address 10.1.1.2 correctly identifies the virtual server, while source 0.0.0.0/0 appropriately permits clients from any source. Changing the protocol to UDP would be incorrect because SSH requires TCP.
Reference Topics: Virtual Server configuration; HTTP profiles; TCP profiles; application-protocol profile assignment; SSH traffic handling.

質問 # 86
Refer to the exhibit.

A BIG-IP Administrator needs to configure health monitors for a newly configured server pool named Pool_B. Which health monitor settings will ensure that all pool members will be accurately marked as available or unavailable?

A. HTTPS and HTTP with the Availability Requirement of at least one health monitor
B. HTTPS, HTTP, FTP, and SSH, with the Availability Requirement of at least one monitor
C. HTTPS, HTTP, FTP, and ICMP, with the Availability Requirement of all health monitors
D. HTTPS, HTTP, FTP, and SSH with the Availability Requirement of all health monitors

正解：B

解説：
The pool member list in the exhibit shows servers listening on four distinct service ports: 80 (HTTP), 21 (FTP), 443 (HTTPS), and 22 (SSH). To accurately monitor a pool where members provide different services, the administrator must apply monitors that correspond to each of those specific services.
The key to this configuration is the Availability Requirement (also known as "Monitor Rule"). If the administrator sets the requirement to "All health monitors," every single monitor (HTTP, HTTPS, FTP, and SSH) must pass for a member to be marked "Up." This would cause an immediate failure: for example, a server listening only on port 80 would fail the HTTPS, FTP, and SSH checks, resulting in the member being marked "Down" even if the HTTP service is healthy.
To ensure accuracy, the administrator should apply all four relevant monitors and set the Availability Requirement to at least one monitor. With this setting, the BIG-IP marks a member as "Up" if any of the assigned monitors return a successful response. Therefore, the member at 10.200.50.210:80 will stay "Up" as long as the HTTP monitor passes, even though it fails the FTP, HTTPS, and SSH monitors. This configuration allows a single pool to contain diverse service types while ensuring that the specific port defined for each member is verified correctly. Option C is incorrect because ICMP only checks if the IP is alive, not if the specific service port is functioning.

質問 # 87
A BIG-IP Administrator needs to apply persistence to a virtual server that is configured as a Performance (Layer 4) virtual server that allows access to a secure (TLS) e-commerce website.
What type of persistence profile can be used? (Choose one answer)

A. Host persistence
B. Microsoft RDP persistence
C. Cookie persistence
D. Source Address Affinity

正解：D

解説：
A Performance (Layer 4) virtual server does not inspect or process application-layer data such as HTTP headers or cookies. Therefore, only Layer 4-compatible persistence methods can be used.
According to the BIG-IP Administration: Data Plane Configuration documentation:
Source Address Affinity persistence operates at Layer 4 and uses the client IP address to maintain session persistence.
It is fully compatible with Performance (Layer 4) virtual servers.
It works regardless of encryption, making it suitable for TLS-secured applications.
Why the other options are incorrect:
B . Cookie persistence
Requires an HTTP profile and Layer 7 inspection, which is not supported on Performance virtual servers.
C . Microsoft RDP persistence
Is protocol-specific and not applicable to web-based TLS traffic.
D . Host persistence
Requires HTTP host header inspection, which is not available at Layer 4.
Correct Resolution:
Source Address Affinity persistence is the appropriate choice for maintaining persistence on a Performance (Layer 4) virtual server handling TLS traffic.
Below is Batch 1 (Questions 1-10) extracted only from your uploaded document that are directly related to BIG-IP Administration: Data Plane Configuration topics (Virtual Servers, Pools, Load Balancing, Monitors, Persistence, SNAT, Profiles).
I have excluded system-only, licensing, support, hardware, HA management-only, and admin UI questions that are not Data Plane-focused.
Source: Your uploaded TMOS Administration v2.0 document
✅ BATCH 1 (10 Questions)

質問 # 88
......

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