検証済みF5CAB4問題集と解答100%合格はここにFast2test [Q38-Q56]

検証済みF5CAB4問題集と解答100%合格はここにFast2test

合格させるF5CAB4試験一発合格保証2026問題集！

質問 # 38
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?
(Choose one answer)

A. Local Traffic > Policies
B. System > Configuration
C. Local Traffic > Virtual Servers
D. System > Archives

正解：D

解説：
In the BIG-IP Configuration Utility, all system backup and restore operations-including UCS (User Configuration Set) file restoration-are performed from the Archives section.
The correct navigation path is:
System > Archives
From this location, the administrator can:
* Upload UCS files
* Restore UCS backups
* Manage system archive files used for backup and recovery
Why the other options are incorrect:
* A. System > Configuration is used for general system settings, not backup restoration.
* C. Local Traffic > Virtual Servers is used for application traffic objects.
* D. Local Traffic > Policies manages traffic policies, not system backups.
Therefore, the correct section to restore a UCS file using the Configuration Utility is System > Archives.

質問 # 39
A BIG-IP Administrator uses a device group to share the workload and needs to perform service on a BIG-IP device currently active for a traffic group. The administrator needs to enable the traffic group to run on another BIG-IP device in the device group.
What should the administrator do to meet the requirement? (Choose one answer)

A. Select Traffic Group and then select Force to Standby
B. Create a new Traffic Group and then fail to Standby Unit
C. Select Traffic Group on Primary Unit and then select Demote
D. Select Traffic Group and then select Failover

正解：D

解説：
Traffic Groups are the mechanism BIG-IP uses to control which device owns specific application traffic in a high-availability (HA) configuration. When maintenance is required on a device that is currently active for a traffic group, the correct and recommended action is to fail over that traffic group to another device in the device group.
* Failing over the traffic group moves ownership of that traffic group (and the virtual servers associated with it) to another available device without forcing the entire device into standby.
* This allows targeted maintenance while minimizing impact to other traffic groups that may still be active on the device.
Why the other options are incorrect:
* A is unnecessary and incorrect; traffic groups are not recreated for routine maintenance.
* C forces the entire device to standby, which may move more traffic than intended.
* D (Demote) affects device trust/priority behavior and is not the standard or recommended method for moving traffic group ownership.
Therefore, selecting the Traffic Group and choosing Failover is the correct solution.

質問 # 40
An LTM device has a virtual server mapped to www.f5.com. Users report that when they connect to /resources
/201.1.2h.l_l.com they are unable to receive content. What is the likely cause of the issue?

A. The virtual address does not have route advertising enabled.
B. The virtual address does not have ARP enabled.
C. The pool associated with the virtual server is falling its health check.
D. The pool associated with the virtual server does not have priority group activation enabled.

正解：B

解説：
The Control Plane is responsible for ARP (Address Resolution Protocol) management for Virtual Addresses.
For a Virtual Server to be reachable, the BIG-IP must respond to ARP requests for that IP. If the "ARP" setting is disabled on the Virtual Address properties, upstream routers cannot resolve the MAC address of the BIG-IP, leading to connectivity failure even if the service itself is "Available."

質問 # 41
A BIG-IP Administrator defines a device Self IP. The Self IP is NOT reachable from the network. What should the administrator verify first?

A. The correct Interface has been selected.
B. The correct Trunk has been selected.
C. Verify if auto last hop is disabled.
D. The correct VLAN has been selected.

正解：D

解説：
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.

質問 # 42
A BIG-IP Administrator must determine if a Virtual Address is configured to fail over to the standby member of a device group. In which area of the Configuration Utility can this be confirmed?

A. Device Management > Traffic Groups
B. Device Management > Devices
C. Device Management > Overview
D. Local Traffic > Virtual Servers

正解：D

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: To re27port the current status of high availability for specific traffic, an administrator must verify the Traffic Group association28. In the Configuration Utility, Virtual Server properties include the Virtual Address settings where the 'Traffic Group' is assigned29292929. If the Virtual Address is assigned to a floating traffic group (like traffic-group-1), it is configured to fail over to the standby member30303030.

質問 # 43
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?

A. Local Traffic > Policies
B. System > Configuration
C. Local Traffic > Virtual Servers
D. System > Archives

正解：D

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 # 44
A BIG-IP administrator is troubleshooting inconsistent configuration objects on devices in a device group.
The administrator uses the command:
tmsh run /cm watch-devicegroup-device
and observes the following output:
devices <devgroup> device clu_id cl_orig cl_time last_sync
20:21 sync_test bigip_a 3273 bigip_a 14:27:00
20:21 sync_test bigip_b 1745 bigip_b 13:52:34 13:42:04
20:21 sync_test bigip_c 1745 bigip_a 13:52:34 13:42:04
What two conclusions can be made about this output? (Choose two answers)

A. The correct configuration exists on bigip_b and bigip_c because their cluster times match.
B. The config from bigip_c was synced to the other devices in the device group during the most recent ConfigSync.
C. Two of the devices in the device group have a configuration that is out of date.
D. bigip_a has the latest configuration.
E. The correct configuration exists on bigip_a and bigip_c because their cluster times match.

正解：C、D

解説：
watch-devicegroup-device shows (among other columns) the commit ID (cid.id / shown here as clu_id), the originating device for that commit (cid-orig / shown here as cl_orig), and the time the configuration change was made (cid.time / shown here as cl_time). The highest/newest commit ID and its time represent the most recent configuration change seen among the devices. (clouddocs.f5.com)
* bigip_a has the latest configuration (A) because it shows commit ID 3273 at 14:27:00, which is newer than commit ID 1745 at 13:52:34 on bigip_b and bigip_c. (clouddocs.f5.com)
* Two devices are out of date (B) because bigip_b and bigip_c are still on the older commit ID 1745, so they do not match the latest commit shown on bigip_a. (clouddocs.f5.com) Why the other options are not supported by this output:
* C is not supported: bigip_c is not showing a newer commit than the others; it's on the older commit (1745), so it's not the source of the most recent change. The output's cid-orig column is what tells you where the change was made. (clouddocs.f5.com)
* D/E are incorrect logic: matching cid.time between two devices only indicates they share the same change timestamp/commit, not that it is the correct or latest configuration. The "latest" is indicated by the newest commit ID/time (here, bigip_a). (clouddocs.f5.com)

質問 # 45
Which file should the BIG-IP Administrator check to determine when a Virtual Server changed its status?

A. /var/log/lastlog
B. /var/log/ltm
C. /var/log/monitors
D. /var/log/audit

正解：B

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: Monitoring and reporting current device status involves tracking the health of traffic objects like Virtual Servers20. The Control Plane logs transition events-such as a Virtual Server moving from 'Available' (green) to 'Offline' (red) due to health monitor failures-in the /var/log/ltm file21212121. While the audit log tracks who changed a configuration, the LTM log tracks system-initiated status changes22222222.

質問 # 46
A BIG-IP administrator is troubleshooting inconsistent configuration objects on devices in a device group. The administrator uses the command:
tmsh run /cm watch-devicegroup-device
and observes the following output:
devices <devgroup> device clu_id cl_orig cl_time last_sync
20:21 sync_test bigip_a 3273 bigip_a 14:27:00
20:21 sync_test bigip_b 1745 bigip_b 13:52:34 13:42:04
20:21 sync_test bigip_c 1745 bigip_a 13:52:34 13:42:04
What two conclusions can be made about this output? (Choose two answers)

A. The correct configuration exists on bigip_b and bigip_c because their cluster times match.
B. The config from bigip_c was synced to the other devices in the device group during the most recent ConfigSync.
C. Two of the devices in the device group have a configuration that is out of date.
D. bigip_a has the latest configuration.
E. The correct configuration exists on bigip_a and bigip_c because their cluster times match.

正解：C、D

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
watch-devicegroup-device shows (among other columns) the commit ID (cid.id / shown here as clu_id), the originating device for that commit (cid-orig / shown here as cl_orig), and the time the configuration change was made (cid.time / shown here as cl_time). The highest/newest commit ID and its time represent the most recent configuration change seen among the devices. (clouddocs.f5.com) bigip_a has the latest configuration (A) because it shows commit ID 3273 at 14:27:00, which is newer than commit ID 1745 at 13:52:34 on bigip_b and bigip_c. (clouddocs.f5.com) Two devices are out of date (B) because bigip_b and bigip_c are still on the older commit ID 1745, so they do not match the latest commit shown on bigip_a. (clouddocs.f5.com) Why the other options are not supported by this output:
C is not supported: bigip_c is not showing a newer commit than the others; it's on the older commit (1745), so it's not the source of the most recent change. The output's cid-orig column is what tells you where the change was made. (clouddocs.f5.com) D/E are incorrect logic: matching cid.time between two devices only indicates they share the same change timestamp/commit, not that it is the correct or latest configuration. The "latest" is indicated by the newest commit ID/time (here, bigip_a). (clouddocs.f5.com)

質問 # 47
What are the recommended methods for forcing a BIG-IP system to standby mode? (Choose two answers)

A. Active BIG-IP: Configuration Utility > Device Management > Devices > Local Device (Self) > Force to Standby
B. Active BIG-IP: CLI > tmsh run /sys failover standby
C. Active BIG-IP: CLI > tmsh run /sys failover device standby
D. Active BIG-IP: Configuration Utility > Device Management > Traffic Groups > Local Device (Self) > Force to Standby

正解：A、C

解説：
BIG-IP provides two supported and documented methods to manually force a device into standby state in a high-availability (HA) configuration:
* CLI method (A):
* tmsh run /sys failover device standby
This is the correct and supported TMSH command to force the local device to transition from active to standby.
* Configuration Utility method (B):Navigating to Device Management > Devices > Local Device (Self) and selecting Force to Standby performs the same operation through the GUI and is fully supported.
Why the other options are incorrect:
* C is incorrect: Traffic Groups do not provide a "Force to Standby" option for the local device; traffic groups are used to manage which device owns specific traffic, not to force device-level failover.
* D is incorrect: tmsh run /sys failover standby is not a valid TMSH command. The correct syntax requires device standby.
Thus, the correct answers are A and B.

質問 # 48
Which file should the BIG-IP Administrator check to determine when a Virtual Server changed its status?

A. /var/log/lastlog
B. /var/log/ltm
C. /var/log/monitors
D. /var/log/audit

正解：B

解説：
Monitoring and reporting current device status involves tracking the health of traffic objects like Virtual Servers20. The Control Plane logs transition events-such as a Virtual Server moving from 'Available' (green) to 'Offline' (red) due to health monitor failures-in the /var/log/ltm file21212121. While the audit log tracks who changed a configuration, the LTM log tracks system-initiated status changes22222222.

質問 # 49
The BIG-IP appliance fails to boot. The BIG-IP Administrator needs to run the End User Diagnostics (EUD) utility to collect data to send to F5 Support. Where can the BIG-IP Administrator access this utility?

A. Management Port
B. External VLAN interface
C. Console Port
D. Internal VLAN interface

正解：C

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: The EUD is a 33hardware-level diagnostic tool that runs outside of the TMOS operating system. Because it is used when the system cannot boot or is in a pre-boot state, it cannot be accessed via the GUI or management network. The administrator must connect physically via the serial Console Port to interact with the boot menu and initiate the hardware tests.

質問 # 50
A BIG-IP Administrator needs to update the license on a BIG-IP device. Where can this be done?

A. System > Software Management
B. System > Platform
C. Device Management
D. System > License

正解：D

解説：
Managing the license is a primary Control Plane task required to activate software modules and features on a BIG-IP device.
* License Management Utility: All actions related to the device license, including initial activation, renewal, and adding add-on keys, are performed under the System > License section of the Configuration Utility.
* Procedural Requirements: Licensing often requires the generation of a "dossier," which is a unique encrypted string used by the F5 License Server to generate the final license file.
* Impact on Services: Updating or re-activating a license generally requires a restart of system services (such as the tmm daemon), which will temporarily disrupt traffic processing unless performed on a standby unit in a high availability pair.
* Add-on Licenses: If an administrator needs to increase the capacity of a specific module (like increasing the SSL TPS limit or adding a new module like ASM), the new registration keys are entered through this same interface using the "Re-activate" button.

質問 # 51
A BIG-IP Administrator needs to fall over the active device. The administrator logs into the Configuration Utility and navigates to Device Management > Traffic Group. However, "Force to Standby" is greyed out.
What is causing this issue?

A. The BIG-IP Administrator is logged in as administrator
B. The BIG-IP Administrator is logged in as root
C. The BIG-IP Administrator is NOT logged into command line to tail over
D. The BIG-IP Administrator is on the Standby Device

正解：D

解説：
In a High Availability pair, the "Force to Standby" action is a Control Plane command used to trigger a manual failover. This option is only logical and available on the device that is currently in the Active state. If the button is greyed out, it indicates that the administrator is already logged into the Standby unit, which has no active traffic groups to relinquish.

質問 # 52
The BIG-IP system is provisioned for LTM only. The BIG-IP Administrator is tasked with provisioning ASM.
What process restarts when the BIG-IP Administrator changes the module provisioning? (Choose one answer)

A. bd
B. tmm
C. httpd
D. sshd

正解：B

解説：
When a BIG-IP Administrator changes module provisioning (for example, enabling ASM on a system previously provisioned only for LTM), the BIG-IP system must restart the Traffic Management Microkernel (TMM) process.
The TMM process is responsible for:
* Traffic handling
* LTM, ASM, and other traffic-processing modules
* Enforcing security and application policies
Provisioning changes affect how traffic modules are loaded and integrated into TMM. As a result, TMM is restarted, which causes a temporary interruption of traffic processing. This is expected behavior and is why module provisioning changes should be planned during a maintenance window.
Why the other options are incorrect:
* A. bd is related to blade/platform management, not module provisioning.
* C. sshd handles SSH access and is not affected by provisioning changes.
* D. httpd supports the Configuration Utility (GUI) and does not restart due to module provisioning.
Therefore, the correct answer is B. tmm.

質問 # 53
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?

A. System > Configuration
B. System > Preferences
C. System > Platform
D. System > Services

正解：A

解説：
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.

質問 # 54
A BIG-IP Administrator is unable to connect to the management interface via HTTPS. What is a possible reason for this issue?

A. An incorrect management route is specified.
B. The IP address of the device used to access the management interface is NOT included in the "httpd Allow" list in the CLI.
C. The port lockdown setting is configured to Allow None.
D. The IP address of the device used to access the management interface is NOT included in the "P Allow" list in the Configuration Utility.

正解：B

解説：
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents: Management connectivity is protected by an allowed access list for the httpd daemon. Unlike TMM data ports which use 'Port Lockdown' settings, the management port's access is controlled by a specific 'Allow' list323232. If an administrator's IP is not explicitly included in this list, the Control Plane will reject HTTPS connection attempts to the management utility33.

質問 # 55
New Syslog servers have been deployed in an organization. The BIG-IP Administrator must reconfigure the BIG-IP system to send log messages to these servers. In which location in the Configuration Utility can the BIG-IP Administrator make the needed configuration changes to accomplish this?

A. System > Logs > Configuration
B. System > Configuration > Local Traffic
C. System > Configuration > Device3
D. System > Logs > Audit2

正解：A

解説：
Managing how a BIG-IP communicates with external management services like Syslog is a core Control Plane task. The Configuration Utility organizes these settings under the "System" menu. Specifically, to define remote logging destinations and formats, the administrator must navigate to System > Logs > Configuration to ensure the Control Plane correctly forwards system events to external collectors

質問 # 56
......

F5 F5CAB4 認定試験の出題範囲：

トピック	出題範囲
トピック 1	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 2	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 3	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 4	Explain config sync: This section focuses on configuration synchronization procedures, identifying sync errors, determining sync necessity, checking sync status, and comparing configuration timestamps.
トピック 5	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.
トピック 6	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.