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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Control Plane Administration |
| Exam Number: | F5CAB4 |
| Certificate Validity Period: | No fixed expiration; recertify per F5 policy |
| Exam Format: | Scenario-based questions, Multiple choice |
| Passing Score: | 245 / 350 |
| Exam Duration: | 30 minutes |
| Real Exam Qty: | 30 |
| Related Certifications: | F5 Certified Administrator, BIG-IP (F5-CA, BIG-IP) |
| Available Languages: | English |
| Exam Price: | USD 50 (Online), USD 65 (Test Center) |
| Recommended Training: | F5 Official Training |
| Exam Registration: | Certiverse Pearson VUE |
| Sample Questions: | F5 F5CAB4 Sample Questions |
| Exam Way: | Online proctored (Certiverse) or Test center proctored (Pearson VUE) |
| Pre Condition: | Basic understanding of BIG-IP installation, configuration and upgrades |
| Official Syllabus URL: | https://education.f5.com/certification/big-ip-administration-control-plane-administration-f5cab4 |
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NEW QUESTION # 17
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)
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
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.
NEW QUESTION # 18
The BIG-IP Administrator suspects unauthorized SSH login attempts on the BIG-IP system.
Which log file would contain details of these attempts? (Choose one answer)
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
On BIG-IP systems, authentication and authorization events are logged in /var/log/secure. This includes:
Successful and failed SSH login attempts
Invalid user authentication attempts
PAM (Pluggable Authentication Module) authentication failures
Access denials related to secure services
Why the other options are incorrect:
/var/log/messages contains general system messages and service events, not detailed authentication failures.
/var/log/audit records administrative configuration changes (who changed what and when), not login attempts.
/var/log/ltm logs traffic-management (TMM) and application-related events.
Therefore, the correct log file for investigating unauthorized SSH login attempts is /var/log/secure.
NEW QUESTION # 19
A BIG-IP Administrator finds the following log entry: tnm tmm[7141]: 011e0002:4: sweeper_update: aggressive mode activated. Which action should the BIG-IP Administrator take to mitigate this memory issue?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: This log message indicates that the system is low on memory and has activated 'Aggressive Mode' to reclaim resources by closing old connections37. In an HA environment, one way to ensure state stability during memory pressure is to manage how connection data is handled38. While the document suggests D, procedural mitigation for 'Aggressive Mode' often involves reviewing resource provisioning or optimizing connection idle timeouts to reduce memory footprint39.
NEW QUESTION # 20
A BIG-IP Administrator finds the following log entry:
tnm tmm[7141]: 011e0002:4: sweeper_update: aggressive mode activated.
Which action should the BIG-IP Administrator take to mitigate this memory issue?
Answer: B
Explanation:
This log message indicates that the system is low on memory and has activated 'Aggressive Mode' to reclaim resources by closing old connections. In an HA environment, one way to ensure state stability during memory pressure is to manage how connection data is handled. While the document suggests D, procedural mitigation for 'Aggressive Mode' often involves reviewing resource provisioning or optimizing connection idle timeouts to reduce memory footprint.
NEW QUESTION # 21
Refer to the exhibit. The BIG-IP Administrator is investigating disk utilization on the BIG-IP device. What should the BIG-IP Administrator check next? (Choose one answer)
Answer: D
Explanation:
When troubleshooting a BIG-IP system where a partition is reported as full (100% utilization), identifying and removing large or unnecessary files is the immediate next step for restoration of system stability.
Symptoms of Full Partitions: If a file system (such as the root / or /var) becomes full, it can result in unpredictable system behavior, failure to save configurations, and the inability to log in to the Web UI.
The Root (/) Partition: This partition is intentionally kept small on F5 systems. It is highly sensitive to the storage of third-party software or diagnostic files that should ideally be stored in the /shared or /var directories.
Procedural Resolution: To resolve 100% disk usage, administrators should check for large files on the affected partition using CLI commands like du -ah or find / -xdev -type f -exec du {} \; | sort
-rn | head -20.
Common Culprits: Large files typically causing these issues include old core files, tech support bundles, large diagnostic logs (packet diags), or temporary files created during administrative tasks.
Diagnostics vs. Remediation: While tests like the EUD (End User Diagnostics) or platform diagnostics are useful for hardware verification, they do not resolve file system exhaustion issues that have already reached a critical 100% state.
NEW QUESTION # 22
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