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| Certification Vendor: | F5 Networks |
|---|---|
| Exam Name: | F5 Certified BIG-IP Administrator: Data Plane Configuration |
| Exam Number: | F5CAB3 |
| Real Exam Qty: | 60-80 |
| Exam Format: | Build List, Multiple Choice, Multiple Select |
| Passing Score: | 247 out of 350 (approximately 70%) |
| Exam Price: | $160 USD |
| Certificate Validity Period: | 2 years |
| Available Languages: | English |
| Exam Duration: | 120 minutes |
| Related Certifications: | F5 Certified Specialist, Data Plane Configuration F5 Certified BIG-IP Administrator (F5-CA) |
| Sample Questions: | F5 F5CAB3 Sample Questions |
| Exam Way: | Online proctored or test center |
| Pre Condition: | Recommended: F5 Certified Administrator certification or equivalent experience with BIG-IP LTM |
| Official Syllabus URL: | https://www.f5.com/go/certification |
合格テストを準備する過程で、F5CAB3ガイド資料とサービスがあなたを支援します。時間とエネルギーを節約して、タイムスケジュールの調整、関連する書籍や文書の検索、権限のある人への問い合わせを行うことができます。私たちの学習教材は確かに有効で高効率なので、F5CAB3試験のワンショットに本当に合格したい場合は、私たちを選択する必要があります。私たちのF5CAB3トレーニングエンジンの多くの利点を活用して、あなたの強さを強化するのに役立つ、F5CAB3学習教材の使用プロセスをご覧ください。
| トピック | 出題範囲 |
|---|---|
| トピック 1 |
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| トピック 2 |
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質問 # 51
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)
正解：A
解説：
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.
質問 # 52
A BIG-IP Administrator is setting up a new BIG-IP device. The network administrator reports that the interface has an incompatible media speed. The BIG-IP Administrator needs to change this setting manually.
From which location should the BIG-IP Administrator perform this task?
正解：D
解説：
Standard BIG-IP administration dictates that hardware-level physical attributes are managed within the Network section of the configuration. When a network switch and a BIG-IP fail to successfully negotiate speed and duplex settings (Auto-Negotiation), it can result in CRC errors, late collisions, or a total lack of link. To resolve this manually, the administrator must navigate to the Configuration Utility (GUI) and go to Network > Interfaces.
Within the Interfaces list, the administrator can select the specific physical port (e.g., 1.1 or 1.2) and modify its properties. By default, the media speed is set to "Auto," but the drop-down menu allows for manual selection of specific speeds (e.g., 100Mb/s, 1Gb/s, 10Gb/s) and duplex settings (Full or Half). While these changes can also be made via the TMOS Shell (TMSH) (Option B) using the modify net interface command, the question asks for the standard location, which in most administrative contexts refers to the primary GUI path. System > Configuration (Option D) is used for global device settings like NTP, DNS, and licensing, not for interface-specific physical layer parameters. The Front Console (Option A), referring to the LCD panel on physical appliances, is primarily used for initial management IP setup and viewing system alerts, but does not provide the granular interface configuration required for media speed adjustments.
質問 # 53
Users are unable to reach an application. The Virtual Server shows a red diamond status in the Configuration Utility.
What is the cause?
正解：C
解説：
A red diamond indicates the Virtual Server is enabled but unavailable due to all pool members being down.
質問 # 54
A web server administrator informs the BIG-IP Administrator that web servers currently load-balanced require encrypted traffic. Starting next month, the web server administrator will offload SSL. Starting next month, the BIG-IP device will terminate SSL to reduce web server load. The BIG-IP device is already using Client SSL, Client port, and iRules on HTTP traffic. What actions should the BIG-IP Administrator take to achieve the desired configuration? (Choose one answer)
正解：A
解説：
To solve this requirement, we must distinguish between the two "legs" of an SSL connection in a BIG-IP environment: Client-side and Server-side.
* Current State (SSL Bridging): The administrator states the servers currently require encrypted traffic.
This means the BIG-IP is likely performing "SSL Bridging." In this setup, a Client SSL profile terminates encryption from the user, and a Server SSL profile re-encrypts the traffic before sending it to the back-end servers.
* Target State (SSL Offloading): The requirement is to "offload SSL" to reduce web server load. This means the BIG-IP will continue to handle the encryption for the users (keeping the Client SSL profile) but will communicate with the back-end servers using unencrypted HTTP.
Why Option A is correct:
* Remove the Server SSL profile: By removing this profile, the BIG-IP stops attempting to initiate an SSL
/TLS handshake with the pool members.
* Configure Pool Members to use HTTP: The service port for the pool members must be changed (typically from port 443 to port 80) so that the BIG-IP sends standard HTTP traffic to the servers.
Why other options are incorrect:
* B & D: These suggest removing the Client SSL profile. If you remove this, the users can no longer connect via HTTPS, which violates the requirement for encrypted communication between the users and the BIG-IP.
* C: Changing the Virtual Server to accept HTTP traffic would mean the user-to-BIG-IP connection is no longer encrypted, which is the opposite of SSL termination/offloading.
質問 # 55
All pool members are online. All other virtual server settings are at default.
What might alter the load balancing behavior? (Choose one answer)
正解：C
解説：
By default, BIG-IP load balancing algorithms (such as Round Robin) distribute connections evenly across all available pool members. However, persistence profiles override normal load balancing decisions by forcing subsequent connections from a client to be sent to the same pool member.
According to the BIG-IP Administration: Data Plane Configuration documentation:
* Persistence creates a client-to-server mapping that is honored before load balancing algorithms are applied.
* When persistence is enabled, BIG-IP may repeatedly select the same pool member even if others are available.
* This directly alters load balancing behavior.
Why the other options are incorrect:
* A. Adding a OneConnect profileOneConnect optimizes server-side TCP connections but does not change which pool member is selected.
* B. Enabling SNAT automapSNAT affects source address translation, not pool member selection.
* C. Enabling a fallback host in the HTTP profileA fallback host is only used when no pool members are available.
Correct Resolution:
Adding a persistence profile alters load balancing behavior by maintaining client affinity to a specific pool member.
質問 # 56
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