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F5 F5CAB5 認定試験の出題範囲：

トピック出題範囲
トピック 1
  • Determine resource utilization: This domain covers analyzing system resources including control plane versus data plane usage, CPU statistics per virtual server, interface statistics, and disk and memory utilization.
トピック 2
  • Identify the reason a virtual server is not working as expected: This section covers diagnosing virtual server issues including availability status, profile conflicts and misconfigurations, and incorrect IP addresses or ports.
トピック 3
  • Given a scenario, review basic stats to confirm functionality: This section involves interpreting traffic object statistics and network configuration statistics to validate system functionality.
トピック 4
  • Identify the reason a pool is not working as expected: This domain focuses on troubleshooting pools including health monitor failures, priority group membership, and configured versus availability status of pools and members.
トピック 5
  • Identify the reason load balancing is not working as expected: This domain addresses troubleshooting load balancing by analyzing persistence, priority groups, rate limits, health monitor configurations, and availability status.

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F5CAB5テストトレーニング、F5CAB5トレーリング学習

F5CAB5トレーニングテストの購入は複雑ではありません。F5主に4つのステップがあります。最初に、必要に応じて対応するバージョンを選択できます。 次に、正しいメールアドレスを入力する必要があります。 また、その後のリリースでユーザーがメールを変更した場合は、MogiExamメールを更新する必要があります。 次に、ユーザーは購入するためにF5CAB5学習教材の支払いページに入る必要があります。 最後に、支払いから10分以内に、システムは自動的にBIG-IP Administration Support and TroubleshootingのF5CAB5学習資料をユーザーのメールアドレスに送信します。 そして、すぐにF5CAB5試験に合格して合格することができます。

F5 BIG-IP Administration Support and Troubleshooting 認定 F5CAB5 試験問題 (Q81-Q86):

質問 # 81
A BIG-IP Administrator disabled a virtual server with a pool that has a working health monitor.
How does the status icon look for this virtual server?

正解：A

解説：
BIG-IP status icons provide immediate visual feedback regarding the state of an object based on its availability and enabled/disabled status.
Color (Black): The color black indicates that an object has been manually Disabled by an administrator.
Shape (Circle): The circular shape indicates that the object is Available (i.e., its health monitors are passing).
Scenario Result: Since the virtual server is manually disabled (Black) but its associated pool has a working health monitor that is currently passing (Circle), the resulting icon is a Black Circle.


質問 # 82
Which command restarts a BIG-IP service?

正解：C

解説：
Used to restart specific system services.


質問 # 83
Due to a change in application requirements, a BIG-IP Administrator needs to modify the configuration of a Virtual Server to include a Fallback Persistence Profile. Which persistence profile type should the BIG-IP Administrator use for this purpose?

正解：B

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration S73upport and Troubleshooting documents: Persistence is critical for ensuring that a client's session remains with the same pool member throughout its duration. If primary persistence (like Cookie Persistence) fails-for instance, because the client has disabled cookies-load balancing will not work as expected, and the session may be broken. A "Fallback Persistence Profile" provides a backup method75. The most common and reliable fallback method is "Source Address Affinity"76. This method tracks the client's IP address in the BIG-IP's persistence table and ensures that any subsequent requests from that IP are routed to the same pool member, even if the primary persistence token is missing. Troubleshooting session drops often involves checking if a fallback method is configured to handle scenarios where the primary method is unsupported by the client's browser or environment. Without a fallback, the BIG-IP would revert to standard load balancing, potentially sending the client to a different server that lacks their session data.


質問 # 84
Plaintext
warning tmm[<pid>]: 011e0002:4: sweeper_segment_cb_any: Aggressive mode /Common/default-eviction- policy activated (0) (global memory). (345209/690176 pages) warning tmm[<pid>]: 011e0003:4: Aggressive mode sweeper: /Common/default-eviction-policy (0) (global memory) 1 Connections killed What is happening when the BIG-IP Administrator sees the messages in the LTM log displayed above? (Pick the 2 correct responses below)

正解：B、D

解説：
These log messages indicate that the BIG-IP system is under significant resource pressure and has activated its Adaptive Connection Management.
* Global Eviction Policy: The message Aggressive mode ... activated (global memory) confirms that the system has reached a memory utilization threshold that triggers the eviction policy. This happens because TMM (the data plane) is running low on available memory pages.
* Sweeper/Reaping: Once in "Aggressive mode," the BIG-IP "sweeper" starts reaping (terminating) connections to free up memory. The log Connections killed confirms this is occurring.
* Impact: The system does not drop all connections; it targets connections based on the eviction policy (e.g., oldest connections or those exceeding limits) to bring memory usage back to safe levels. Thus, some connections will be dropped (Option A), and the cause is TMM memory exhaustion (Option C).


質問 # 85
A BIG-IP Administrator configured the following virtual server to pass traffic on all addresses and ports. After configuration is completed, the BIG-IP Administrator notices that the virtual server is unable to pass traffic.
Plaintext
ltm virtual forwarding_any_vs {
destination 0.0.0.0:any
ip-forward
mask 255.255.255.255
profiles {
fastL4 {}
}
serverssl-use-sni disabled
source 0.0.0.0/0
translate-address disabled
translate-port disabled
}
Which part of the configuration is the cause of the issue?

正解：B

解説：
The failure of the Forwarding (IP) virtual server is caused by an incorrect Network Mask configuration for a wildcard destination.
Wildcard Destination: The administrator intends to create a "Wildcard" Virtual Server that listens for any destination IP address (0.0.0.0).
The Mask Conflict: A mask of 255.255.255.255 (or /32) tells the BIG-IP to look for a specific, single host address. When combined with 0.0.0.0, the system is literally looking for traffic destined for the IP 0.0.0.0, which is not a valid routable destination for standard traffic.
Correct Configuration: To allow the virtual server to catch traffic for any IP address, the mask must be changed to 0.0.0.0 (or /0). This signifies that the system should ignore all bits of the destination address and match everything.
Forwarding Logic: The rest of the configuration-including ip-forward (Forwarding IP type), translate-address disabled, and translate-port disabled-is correct for a BIG-IP acting as a router/gateway.


質問 # 86
......

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