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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Health Monitors and Persistence | 20-25% | - OneConnect and connection multiplexing - Fallback host and persistence TTL - Monitor types and configurations - Persistence profiles (Cookie, Source Address, Universal) - Monitor assignment and interval settings |
| Topic 2: LTM Fundamentals | 15-20% | - Objects and their relationships - License and provisioning modules - Traffic Management Shell (tmsh) CLI - Configuration architecture and files - Licensing types |
| Topic 3: SSL/TLS Configuration | 15-20% | - SSL termination and re-encryption - SSL profiles (Client and Server) - Certificate validation settings - Cipher groups and compatibility - Certificate and key management |
| Topic 4: Traffic Management Features | 15-20% | - iRules basics and events - HTTP profile settings - NAT and SNAT concepts - Compression and caching profiles - Connection limits and rate shaping - OneConnect |
| Topic 5: Virtual Servers and Pools | 25-30% | - Virtual server configuration options - Priority group activation - Virtual server types (Standard, Forwarding, Performance L4, Regex) - Node and pool management - Address translation and port translation - Pool configuration and members - Load balancing algorithms |
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質問 # 29
A node is a member of multiple pools hosting different web applications. If one application fails, only that pool member should be marked down.
What should be configured?
正解:B
解説:
Application-specific health checks must validate application responses, which requires HTTP monitors with custom send/receive strings.
質問 # 30
A BIG-IP Administrator is configuring an SSH Pool with five members. Which Health Monitor should be applied to ensure that available pool members are monitored accordingly?
正解:C
解説:
SSH (Secure Shell) operates over TCP port 22 , making the TCP health monitor the appropriate and correct choice for monitoring pool members in an SSH pool. The TCP monitor establishes a basic Layer 4 connection to each pool member on the designated port, verifying that the server is reachable and actively accepting TCP connections. A successful three-way handshake confirms the pool member is available; a failure marks it down and removes it from load balancing rotation.
The remaining monitor types are inappropriate for this use case:
* UDP monitor operates at Layer 4 but uses the connectionless UDP protocol, which is incompatible with SSH since SSH exclusively uses TCP as its transport.
* HTTP monitor sends a Layer 7 GET request expecting an HTTP response - irrelevant for an SSH service that does not speak the HTTP protocol.
* HTTPS monitor functions identically to HTTP but over TLS - again, completely misaligned with SSH traffic and port behaviour.
For application-specific SSH validation beyond basic TCP connectivity, an external monitor or custom monitor could be used; however, TCP remains the standard and correct built-in monitor for SSH pool verification within the BIG-IP platform.
Reference: BIG-IP Administration - Data Plane Configuration, Module: Health Monitors - Monitor Types and Protocol Alignment.
質問 # 31
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?
正解:D
解説:
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.
質問 # 32
A Standard Virtual Server for a web application is configured with Automap for Source Address Translation. The original client IP must be known by backend servers.
What should the BIG-IP Administrator configure?
正解:B
解説:
The X-Forwarded-For header preserves the original client IP when SNAT is enabled.
質問 # 33
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)
正解:A
解説:
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.
質問 # 34
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F5のF5CAB3試験に受かることを通じて現在の激しい競争があるIT業種で昇進したくて、IT領域で専門的な技能を強化したいのなら、豊富なプロ知識と長年の努力が必要です。F5のF5CAB3試験に受かるのはあなたが自分をIT業種にアピールする方法の一つです。でも、試験に合格するために大量な時間とエネルギーを費やすことはなく、Pass4TestのF5のF5CAB3試験トレーニング資料を選んだらいいです。Pass4Testのトレーニング資料はIT認証試験に受かるために特別に研究されたものですから、この資料を手に入れたら難しいF5のF5CAB3認定試験に気楽に合格することができるようになります。
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