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| Section | Objectives |
|---|---|
| Monitoring and Troubleshooting Basics | - Logging and diagnostics
|
| Control Plane Fundamentals | - System management concepts
|
| System Administration and Operations | - Authentication and system services
|
| Maintenance and Lifecycle Operations | - Upgrades and updates
|
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NEW QUESTION # 60
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: A
Explanation:
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 # 61
A BIG-IP Administrator suspects that one of the BIG-IP device power supplies is experiencing power outages. Which log file should the BIG-IP Administrator check to verify the suspicion?
Answer: C
Explanation:
Although /var/log/ltm is primarily associated with Local Traffic Manager events, it is also the primary destination for system-level alerts generated by the Control Plane's chmand (Chassis Manager Daemon). Hardware status changes, including power supply failures, fan speeds, and temperature warnings, are logged as "notice" or "critical" events within the LTM log file.
NEW QUESTION # 62
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)
Answer: B
Explanation:
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 archiveNot supported or recommended; UCS files should not be manually modified.
* B. Revoke the license prior to restoringLicense revocation does not prevent the UCS from attempting to load license data.
* D. Reactivate the license on the new device using the manual activation methodThis 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.
NEW QUESTION # 63
A BIG-IP Administrator needs to update the list of configured NTP servers. In which area of the Configuration Utility should the BIG-IP Administrator perform this update?
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: NTP (Network Time Protocol) is vital for management connectivity and HA state synchronization. Correct time is required for log timestamping and device trust group communication46. To manage these settings, the administrator navigates to System > Configuration, where general system-level services like NTP and DNS are defined to ensure the Control Plane remains synchronized with the network environment.
NEW QUESTION # 64
A BIG-IP Administrator defines a device Self IP. The Self IP is NOT reachable from the network.
What should the administrator verify first?
Answer: D
Explanation:
Connectivity management requires a proper logical-to-physical mapping within the BIG-IP Control Plane.
VLAN Association: In TMOS, a Self IP address is not assigned directly to a physical interface.
Instead, it is assigned to a VLAN (Virtual Local Area Network) object.
Procedural Troubleshooting: If a Self IP is unreachable, the primary failure point is often that the IP was associated with the wrong VLAN, or the VLAN itself is not correctly associated with the intended physical interface or trunk.
Layer 2 Mapping: The Control Plane requires the VLAN to be "up" and "untagged" or "tagged" on a valid interface for traffic to flow. If the administrator selects the incorrect VLAN, the Self IP will exist in the configuration but will be logically isolated from the physical network wire.
NEW QUESTION # 65
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