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F5 Networks F5CAB4 Exam Questions
- Topic 1: Apply procedural concepts required to manage the state of a high availability pair: This domain covers controlling and monitoring failover states in high availability pairs, including forcing standby/offline modes, reporting failover status, and verifying device trust.
- Topic 2: 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.
- Topic 3: Identify and report current device status: This domain covers monitoring BIG-IP operational status through LCD panels, dashboards, Network Map, GUI/TMSH commands, and checking high availability states.
- Topic 4: List which log files could be used to find events and/or hardware issues: This section teaches identification of key log files (/var/log/ltm, secure, audit), understanding event severity levels, and interpreting log messages.
- Topic 5: 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.
- Topic 6: Explain authentication methods: This section focuses on user management including creating/modifying users, configuring remote authentication providers, and implementing group-based access control.
- Topic 7: Identify configured system services: This domain covers verifying proper configuration of essential services including DNS, NTP, SNMP, and syslog.
- Topic 8: Explain config sync: This section focuses on configuration synchronization procedures, identifying sync errors, determining sync necessity, checking sync status, and comparing configuration timestamps.
- Topic 9: 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.
- Topic 10: Given a scenario, interpret Service status: This section teaches interpreting service states, analyzing netstat output, and determining whether services are listening on specific ports.
Free F5 Networks F5CAB4 Exam Actual Questions
Note: Premium Questions for F5CAB4 were last updated On Apr. 19, 2026 (see below)
When looking at this BIG-IP prompt: root@virtual-bigip1] Peer Time Out of Sync
What does the message indicate? (Choose one answer)
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)
A configuration change is made on the standby member of a device group. What is displayed as "Recommended Action" on the Device Management Overview screen?
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: The BIG-IP Control Plane monitors the 'Commit ID' of the configuration on all group members. When a change is made on the Standby unit, it becomes the member with the most recent configuration. The 'Recommended Action' in the HA status dashboard will be to synchronize that specific device's configuration to the rest of the group to ensure consistency
When looking at this BIG-IP prompt: root@virtual-bigip1] Peer Time Out of Sync
What does the message indicate? (Choose one answer)
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)
The BIG-IP Administrator generates a qkview using "qkview -s0" and needs to transfer the output file via SCP. Which directory contains the output file?
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: A QKView is a comprehensive snapshot of the device's Control Plane state, configuration, and logs used for troubleshooting. By default, the qkview utility stores its generated output file in the /var/tmp/ directory. Administrators must know this path to retrieve the file for upload to F5 iHealth or Support.
A BIG-IP Administrator needs to check the memory utilization on a BIG-IP system. Which two methods can the BIG-IP Administrator use? (Choose two.)
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: Reporting device status includes monitoring physical resource exhaustion, such as memory48. The Control Plane provides both a command-line method via TMSH (show /sys memory) and a graphical method under Statistics > Module Statistics > Memory to report on how memory is allocated across TMM and the Linux host494949494949494949. This is essential for identifying potential 'Aggressive Mode' triggers or hardware performance bottlenecks50.
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