F5CAB4認定試験トレーリング、F5CAB4日本語版受験参考書

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F5 F5CAB4 認定試験の出題範囲：

トピック出題範囲
トピック 1
  • Identify configured system services: This domain covers verifying proper configuration of essential services including DNS, NTP, SNMP, and syslog.
トピック 2
  • Given a scenario, interpret Service status: This section teaches interpreting service states, analyzing netstat output, and determining whether services are listening on specific ports.
トピック 3
  • Explain authentication methods: This section focuses on user management including creating
  • modifying users, configuring remote authentication providers, and implementing group-based access control.
トピック 4
  • Apply procedural concepts required to create, manage, and restore a UCS archive: This domain covers UCS backup and restore procedures, understanding backup use cases, proper storage practices, and UCS file contents including private keys.
トピック 5
  • Given a scenario, determine device upgrade eligibility: This domain covers determining appropriate timing for software and platform upgrades and strategies to minimize downtime during upgrades.
トピック 6
  • Identify management connectivity configurations: This section focuses on understanding management access configurations, including management IP addresses, port lockdown settings, remote connectivity verification, and troubleshooting access issues.

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F5 BIG-IP Administration Control Plane Administration 認定 F5CAB4 試験問題 (Q22-Q27):

質問 # 22
When looking at this BIG-IP prompt: root@virtual-bigip1] Peer Time Out of Sync What does the message indicate? (Choose one answer)

正解：A

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
On BIG-IP systems that participate in a Device Service Cluster (DSC), each device compares the remote device's system time to its own system time. If the difference is outside the ConfigSync time threshold (commonly referenced as 3 seconds by default), BIG-IP updates the shell prompt to show "Peer Time Out of Sync", and ConfigSync operations may fail until time is corrected (typically by fixing NTP reachability/configuration, or in some cases adjusting the threshold). (cdn.studio.f5.com) This message is specifically about time drift between peers in the trust domain/DSC-not basic reachability (so B is not what it means), and it does not prove which side is "correct" (so C is too specific). It also doesn't directly mean an NTP source is "skewed" (A can be a cause, but the prompt message itself indicates the peer-to-peer time mismatch condition). (cdn.studio.f5.com)


質問 # 23
A BIG-IP Administrator receives an RMA replacement for a failed F5 device. The Administrator tries to restore a UCS taken from the previous device, but the restore fails. The following error appears in the /var/log/ltm:
insufficient pool members. 01070608:3: License is not operational
(expired, digital signature does not match contents)
What should the BIG-IP Administrator do to avoid this error? (Choose one answer)

正解：A

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
When restoring a UCS file to replacement hardware (RMA device), the license from the original device is not valid on the new system. If the UCS restore attempts to load the old license, BIG-IP reports license errors such as "License is not operational", which can prevent traffic objects (including pools and virtual servers) from loading correctly.
To avoid this issue, F5 documentation recommends restoring the UCS without the license, using the following command:
tmsh load /sys ucs <ucs filename> no-license
This approach:
Restores all configuration objects (LTM, networking, certificates, keys, etc.) Excludes the invalid license tied to the old hardware Allows the administrator to activate a new license separately on the replacement device Why the other options are incorrect:
A . Remove the license information from the UCS archive
Not supported or recommended; UCS files should not be manually modified.
B . Revoke the license prior to restoring
License revocation does not prevent the UCS from attempting to load license data.
D . Reactivate the license on the new device using the manual activation method This must be done after restoring the UCS and does not prevent the restore failure itself.
Therefore, the correct and supported method to avoid this error is C.


質問 # 24
Which log file should the BIG-IP Administrator check to determine if a specific user tried to log in to the BIG-IP Configuration Utility? (Choose one answer)

正解：A

解説：
On BIG-IP systems, all authentication attempts for administrative access-including logins to the Configuration Utility (GUI)-are logged in /var/log/secure. This log file records:
* Successful and failed login attempts
* The username used
* The authentication method (local, LDAP, RADIUS, etc.)
* Access denials and PAM authentication errors
Why the other options are incorrect:
* /var/log/pam/tallylog tracks account lockouts and failed attempt counters, not detailed login attempts.
* /var/log/ltm logs traffic management events, not administrative authentication.
* /var/log/httpd logs web server activity but does not record authentication success or failure for BIG-IP administrative users.
Therefore, the correct log file to verify whether a user attempted to log in to the BIG-IP Configuration Utility is /var/log/secure.


質問 # 25
A BIG-IP Administrator needs to restore a UCS file to an F5 device using the Configuration Utility. Which section of the Configuration Utility should the BIG-IP Administrator access to perform this task?

正解：C

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: Managing the state of a device often involves restoring configuration backups known as User Configuration Set (UCS) files These archives contain the full system configuration, including licenses and SSL certificates. The Control Plane provides a dedicated management area for these files under System > Archives, where administrators can upload, create, and restore configuration snapshots


質問 # 26
Administrative user accounts have been defined on the remote LDAP server and are unable to log in to the BIG-IP device.
Which log file should the BIG-IP Administrator check to find the related messages? (Choose one answer)

正解：A

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
When BIG-IP is configured to use remote authentication (such as LDAP), all authentication and authorization attempts-including successes and failures-are logged to /var/log/secure.
For LDAP-based administrative login issues, /var/log/secure contains:
LDAP authentication failures
PAM authentication errors
Authorization and access-denied messages
Details explaining why a remote user could not log in
Why the other options are incorrect:
/var/log/user.log is not a standard BIG-IP log file for authentication.
/var/log/ltm logs traffic management events, not user authentication.
/var/log/messages contains general system messages but not detailed authentication failure information.
Therefore, the correct log file to troubleshoot LDAP administrative login failures is /var/log/secure.


質問 # 27
......

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