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最近多くの人はIT資格認定試験という悩みがあるようですが、実は、この時代では、F5資格は難しくないです。我々JapancertはIT資格認定試験資料の販売者のリーダーとして、信頼できるF5CAB3問題集を提供します。躊躇われずに我々の模擬試験を利用してください。
| Section | Objectives |
|---|---|
| Advanced Traffic Control | - Monitoring and Health Checks
|
| High Availability and Troubleshooting | - Device Service Clustering (DSC)
|
| Traffic Management and Load Balancing | - Load Balancing Methods
|
| Traffic Processing and Policies | - Profiles and Protocol Handling
|
| F5 BIG-IP System Fundamentals | - Initial Configuration and System Components
|
誰も自分の学習習慣を持っています。F5CAB3問題集は、あなたに異なるシステムバージョンを提供します。 あなたの特定の状況に基づいて、あなたに最も適するF5CAB3問題集バージョンを選択できます。また、複数のバージョンを同時に使用することができます。 だから、各バージョンのF5CAB3問題集には独自の利点があります。 非常に忙しい場合、短い時間でF5CAB3問題集を勉強すると、F5CAB3試験に参加できます。
質問 # 25
A BIG-IP Administrator configures an SSH pool with five members.
Which health monitor should be applied?
正解：D
解説：
SSH is a TCP-based service. A TCP monitor validates service availability without requiring application-layer inspection.
質問 # 26
Refer to the exhibit.
DNS queries from two internal DNS servers are being load-balanced to external DNS servers via a virtual server on a BIG-IP device. The DNS queries originate from:
192.168.10.100
192.168.10.200
and target:
192.168.2.150
All DNS queries destined for the external DNS servers fail.
Which property change should the BIG-IP Administrator make in the Virtual Server to resolve this issue? (Choose one answer)
正解：A
解説：
DNS traffic is primarily transported using UDP port 53. In the exhibit, the Virtual Server is configured with the Protocol set to TCP, which prevents standard DNS queries from being processed correctly. BIG-IP Virtual Servers must be configured with the correct Layer 4 protocol to match the application traffic they are handling.
According to the BIG-IP Administration: Data Plane Configuration documentation:
The Protocol setting on a Virtual Server defines whether traffic is processed as TCP, UDP, or another supported transport protocol.
Standard DNS queries and responses use UDP, while TCP is only required for DNS zone transfers (AXFR) or exceptionally large responses.
When a DNS Virtual Server is incorrectly configured with TCP, UDP-based DNS queries are dropped, causing all requests to fail.
Why the other options are incorrect:
A . Protocol profile (Client) to DNS_OPTIMIZED
A DNS profile enhances DNS functionality but does not correct an incorrect transport protocol configuration.
B . Type to Performance (HTTP)
Performance (HTTP) Virtual Servers are designed for HTTP traffic and are not suitable for DNS services.
C . Source Address to 192.168.10.0/24
The existing source IPs already fall within the allowed range, so this setting does not address the failure.
Correct Resolution:
Changing the Protocol to UDP aligns the Virtual Server with standard DNS transport requirements, allowing DNS queries to be successfully processed and load-balanced.
質問 # 27
A BIG-IP Administrator needs to apply a health monitor for a pool of database servers named DB_Pool that uses TCP port 1521. Where should the BIG-IP Administrator apply this monitor?
正解：C
解説：
In BIG-IP configuration, health monitors can be applied at three distinct levels: the node, the pool, or the individual pool member. To ensure that a specific application service-in this case, a database service on port
1521-is functioning correctly for the entire pool, the administrator should apply the monitor at the pool level. Navigating to Local Traffic > Pools > DB.Pool > Properties allows the administrator to select one or more monitors from the "Available" list and move them to the "Active" list.
Applying a monitor at the pool property level ensures that the BIG-IP checks the health of every member assigned to that pool using the same logic. If a database-specific monitor (such as a TCP handshake or an Oracle/SQL check) fails for a specific member, the BIG-IP marks that member as "offline" for that specific pool, preventing new connections from being sent to it. While monitors can be applied to Pool Members (Option D) to give different members unique monitoring logic, it is more administratively efficient to apply it to the pool properties when all servers are expected to behave identically. Applying it to Nodes (Option C) would only verify that the IP address is up (typically via ICMP), which does not guarantee that the database service on port 1521 is actually responding. Finally, Profiles (Option A) are used to define how traffic is handled once it is accepted by a Virtual Server, not for the proactive health checking of backend resources.
Therefore, the pool properties page is the standard location for configuring service-specific availability requirements.
質問 # 28
The BIG-IP Administrator has to provide encrypted communication between the users and the virtual server they access. Multiple hostnames are configured in DNS with the same IP address. Which profile type and setting in the profile should be used?
正解：B
解説：
When a single IP address (Virtual Server) must host multiple hostnames (e.g., site1.com, site2.com) over HTTPS, the BIG-IP must be able to present the correct SSL certificate for each site during the initial handshake. This requirement is handled by a technology called Server Name Indication (SNI).
To implement this on the BIG-IP, the administrator must use a Client SSL profile because the encryption is occurring between the user (Client) and the Virtual Server. Within the Client SSL profile settings, there is a field called Server Name. By creating multiple Client SSL profiles-each with a different "Server Name" (the hostname) and its corresponding certificate-and attaching them all to the same Virtual Server, the BIG-IP can inspect the SNI extension in the client's "Client Hello" packet. It then selects the specific profile that matches the requested hostname.
Option A is incorrect because "Client Name" is not the standard field name used for SNI hostname matching in the profile. Options B and C refer to Server SSL profiles, which manage the connection between the BIG- IP and the backend servers. While Server SSL profiles also have a "Server Name" field (used to send SNI to a backend server), the requirement here is to provide encrypted communication for "users" accessing the virtual server, which definitively requires a Client-side SSL configuration.
質問 # 29
Application administrators are reporting that nodes different from those configured in the pool are selected.
The use of an iRule is suspected. How can the BIG-IP Administrator check if an iRule is used for this traffic?
(Pick the 2 correct responses below)
正解：B、D
質問 # 30
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