ちなみに、PassTest F5CAB5の一部をクラウドストレージからダウンロードできます：https://drive.google.com/open?id=1YcPFDA8iGBitHZaXpgdD_QWd3ReYbXiM
F5試験問題は専門家によって編集され、認定された担当者によって承認され、さまざまな機能を強化するため、F5CAB5テストトレントを便利かつ効率的に学習できます。購入前に無料ダウンロードと試用を提供しています。 F5CAB5試験の問題では、学生がシミュレーション問題を提供するプラットフォームで20〜30時間練習する必要があり、BIG-IP Administration Support and TroubleshootingのF5CAB5試験に合格する自信を持たせることができます。 F5CAB5試験に合格して目標を達成するための最良のツールでなければなりません。
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Traffic Management Fundamentals | 25% | - Profiles and persistence
|
| Topic 2: Monitoring & Health Checks | 10% | - Monitor types and configuration
|
| Topic 3: Troubleshooting & Support | 20% | - Tools and log analysis
|
| Topic 4: BIG-IP System Architecture & Initial Setup | 20% | - Platform and hardware components
|
| Topic 5: Networking & Routing | 15% | - High availability setup
|
| Topic 6: Maintenance & Upgrades | 10% | - Software installation and upgrades
|
これらの2つの特性により、F5CAB5ガイドトレントを使用するほぼすべての候補者が一度にテストに合格できることがわかります。これは自己決定ではありません。統計によると、当社のF5CAB5ガイドトレントは98％〜99％の高い合格率を達成しており、これは他のすべてをかなり上回る程度です。同時に、F5CAB5テストトレントが毎日更新されるかどうかを確認する専門スタッフがいます。メールでお問い合わせいただく場合でも、オンラインでお問い合わせいただく場合でも、できるだけ早く問題を解決できるようサポートいたします。心配する必要はまったくありません。
質問 # 62
A BIG-IP Administrator notices that one of the servers that runs an application isNOTreceiving any traffic.
The BIG-IP Administrator examines the configuration status of the application and observes the displayed monitor configuration and affected pool member status.
What is the possible cause of this issue? (Choose one answer)
正解：B
解説：
The key clue in the exhibit is the pool member's availability showing"Offline (Enabled) - Parent down". In BIG-IP terminology, a pool member inherits the status of itsparent node. If thenodeis marked down (for example, by a node-level monitor or a default "node is down" condition), thenall pool members using that node IPwill also be marked down and will not receive any traffic, even if the application service on the member port might be healthy.
While the HTTPS monitor configuration (send/receive strings) is displayed, the statusspecificallyindicates anode (parent) failure, not a service-level failure. If the problem were the application not matching the receive string, you would typically see the member down due to themember's monitorfailing (and the status would reflect monitor failure details), rather than "parent down." Option D is too broad; BIG-IP can generally reach the subnet (other servers work), and this symptom points to a specific node condition. Option C is incorrect because HTTP/1.1 is commonly used for monitoring and is valid when properly formatted (especially with a Host header). Therefore, the most likely cause is that thenode health monitor is not responding, causing the node-and consequently the member-to be marked down.
質問 # 63
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?17
正解：A
解説：
When load balancing is not working as 23expected and connections appear skewed across physical hardware, the administrator must distinguish between "member"24 and "node" level balancing. A "member" refers to a specific IP and Port combination (e.g., 10.1.1.1:80), whereas a "node" refers to the underlying IP address (10.1.1.1) regardless of the port25. If a single server hosts multiple services (Web, FTP, API) across different pools, using "Least Connections (member)" would only balance connections within each individual pool26. This could lead to a scenario where one server is overwhelmed because it is winning the "least connections" count in three different pools simultaneously. By selecting "Least Connections (node)," the BIG-IP tracks the total number of concurrent connections to the physical IP address across all pools it belongs to27. This ensures that the administrator can maintain an equal distribution of work across the hardware, preventing performance degradation on backend servers that host multiple application services.
質問 # 64
A traffic group includes four devices. The failover method is HA order. The failover order is:
BIGIP-D
BIGIP-B
BIGIP-C
BIGIP-A
Auto fallback is enabled. BIGIP-D has been forced to standby. BIGIP-B was active before being rebooted. Which device is active when BIGIP-B is up after the reboot?
正解：D
解説：
To understand which device becomes active, we must look at how the BIG-IP system handles HA Order and Auto Fallback within a traffic group.
HA Order Mechanism: When a traffic group is configured with an "HA Order" list, the system prefers to host the traffic group on the highest-ranking available device in that list (1 being the highest).
The Impact of "Forced to Standby": BIGIP-D is the first choice in the order, but it has been "Forced to Standby." This state is persistent and manual; until an administrator releases the "Force to Standby" state, the device is ineligible to host the traffic group, effectively removing it from the top of the preference list.
Auto Fallback: When "Auto Fallback" is enabled, the traffic group will automatically migrate back to a higher-priority device in the HA order as soon as that device becomes available and is in a healthy "Standby" state.
The Scenario Logic: 1. BIGIP-D is ineligible (Forced Offline/Standby).
2. BIGIP-B is the next highest device in the HA Order (Rank 2).
3. While BIGIP-B was rebooting, the traffic group would have failed over to BIGIP-C (Rank 3).
4. Once BIGIP-B finishes booting and joins the cluster in a "Standby" state, the Auto Fallback setting triggers.
5. Because BIGIP-B is higher in the HA Order than the current active device (BIGIP-C) and the only device above it (BIGIP-D) is ineligible, the traffic group fails back to BIGIP-B.
質問 # 65
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?
正解：C
解説：
In F5 TMOS administration, the traffic flow is processed through specific event huddles within iRules. To troubleshoot or modify traffic based on a URI (Uniform Resource Identifier), the BIG-IP system must first parse the application-layer data. The HTTP_REQUEST event is triggered when the system has fully received and parsed the HTTP request headers from the client. This is the correct point to implement logic that selects a pool or pool member based on the path or file requested (e.g., /images or /api). Using CLIENT_ACCEPTED would be too early in the troubleshooting process because that event triggers at the L4 (TCP) connection establishment phase, before any URI information is available. Conversely, HTTP_RESPONSE occurs during the return traffic from the server, which is too late to make a load balancing decision. For troubleshooting virtual server behavior where URIs are involved, ensuring the iRule is attached to a Virtual Server with an HTTP profile and using the HTTP_REQUEST event is essential for proper traffic steering and inspection.
質問 # 66
Refer to the exhibit. A user with IP address 192.168.162.70 is unable to connect to an HTTP application. What is a possible cause within the Virtual Server configuration?
正解：D
解説：
The failure to connect is caused by a restrictive Source Address filter configured on the Virtual Server.
Source Address Filtering: In the BIG-IP system, the Source Address field on a Virtual Server acts as an implicit Access Control List (ACL). Only traffic originating from a client IP address that matches the specified network range will be accepted and processed by the Virtual Server.
Analyzing the Exhibit: The provided configuration for vs_http shows the Source Address is set to
10.128.10.0/24. This means the Virtual Server will only accept connections from the subnet ranging from 10.128.10.1 to 10.128.10.254.
Identifying the Conflict: The user trying to connect has the IP address 192.168.162.70. Since
192.168.162.70 does not fall within the allowed 10.128.10.0/24 range, the BIG-IP system will not match this traffic to the Virtual Server, effectively blocking the connection attempt.
質問 # 67
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