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F5 F5CAB1 認定試験の出題範囲：

トピック	出題範囲
トピック 1	BIG IP Administration Install Initial Configuration and Upgrade: This section of the exam measures skills of System Administrators and covers the lifecycle tasks for deploying and maintaining a BIG IP system. It includes installing the platform, performing initial setup, applying licenses, configuring basic networking, and planning and executing software upgrades and hotfixes.
トピック 2	BIG IP Administration Support and Troubleshooting: This section of the exam measures skills of Network Administrators and covers identifying and resolving common issues that affect BIG IP operation. It focuses on using logs, statistics, diagnostic tools, and basic troubleshooting methods to restore normal traffic flow and maintain stable application delivery.
トピック 3	BIG IP Administration Data Plane Concepts: This section of the exam measures skills of Network Administrators and covers how BIG IP handles application traffic on the data plane. It includes understanding flow of traffic, key data path components, basic concepts of load balancing, and how security and performance features affect user traffic.
トピック 4	BIG IP Administration Data Plane Configuration: This section of the exam measures skills of System Administrators and covers configuring BIG IP objects that control data plane behavior. It focuses on setting up virtual servers, pools, nodes, monitors, and profiles so that applications are delivered reliably and efficiently according to design requirements.
トピック 5	BIG IP Administration Control Plane Administration: This section of the exam measures skills of System Administrators and covers managing the control plane where BIG IP is configured and administered. It includes working with user accounts, roles, device settings, configuration management, and using the graphical interface and command line for daily administrative tasks.

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F5 BIG-IP Administration Install, Initial Configuration, and Upgrade 認定 F5CAB1 試験問題 (Q46-Q51):

質問 # 46
For an upgrade of a standalone BIG-IP, a maintenance window is available in which brief interruptions are allowed.
Actions with no impact can be done outside the maintenance window.
When should a license reactivation be performed?

A. Before the maintenance window.
B. After the maintenance window.
C. During the maintenance window.

正解：A

解説：
License reactivation updates the BIG-IP device's license file to ensure:
* TheService Check Dateis current
* The device is eligible to install the intended TMOS version
* Any module entitlement updates are received
Reactivationdoes not interrupt trafficand does not require a reboot, making it safe to performbeforethe maintenance window.
F5 best practices state:
* Performall non-impact tasks priorto the scheduled maintenance window
* Leave the window available for activities that require rebooting, such as the software installation itself Since license reactivation isnon-disruptive, it should be donebeforethe upgrade window starts.

質問 # 47
For security reasons, a BIG-IP Administrator needs to specify allowable IP ranges for access to the Configuration Utility (WebUI).
The exhibit shows the User Administration section of the Configuration Utility.

The administrator could not find any setting that explicitly restricts access to the Configuration Utility.
Which one of the following is a reason for that?

A. Restricting access to the Configuration Utility can only be done from the Command Line Interface
B. To avoid locking out the administrator, recent versions of BIG-IP no longer allow restricting administrator access to the Configuration Utility by source IP address
C. The administrator must restrict access by IP address for SSH, which will implicitly restrict access to the Configuration Utility
D. The administrator needs to switch to the "Advanced" view mode in order to display the relevant setting

正解：A

解説：
The screenshot shown is from theUser Administrationsection of the BIG-IP GUI.
This section controls:
* Root and Admin passwords
* SSH Access
* SSH IP Allow settings
However,it does not contain any controls for restricting access to the WebUI (TMUI).
BIG-IP does not provide TMUI access restrictions from this part of the GUI.
Access to the web-based Configuration Utility is controlled by thehttpd allow list, configured through TMSH:
tmsh modify /sys httpd allow { <IP/subnet> }
This setting is not displayed in the User Administration panel, and in many BIG-IP versions, the httpd allow list isonly configurable from the CLI, not the GUI.
Therefore, the administrator cannot find the setting in the screen shown because:
* TMUI access restriction isnotlocated in this GUI section
* It must be configured usingtmshunder/sys httpd allow
This is whyOption Ais correct.

質問 # 48
A BIG-IP Administrator is responsible for deploying a new software image on an F5 BIG-IP HA pair and has scheduled a one-hour maintenance window. With a focus on minimizing service disruption, which of the following strategies is the most appropriate?

A. Update the active node first, reboot to the newly updated boot location and verify functionality, then push the update from the active to the standby node and reboot the standby node.
B. Reset the Device Trust, apply the update to each node separately, reboot both nodes, then re- establish the Device Trust.
C. Update the standby node first and reboot it to the newly updated boot location, failover to the newly updated node and verify functionality. Repeat the upgrade procedures on the next node, which is now in standby mode.
D. Update both nodes in the HA pair, then reboot both nodes simultaneously to ensure they run the same software version.

正解：C

質問 # 49
The monitoring team reports that the SNMP server is unable to poll data from a BIG-IP device.

What information will help the BIG-IP Administrator determine whether the issue originates from the BIG-IP system?

A. The configuration on the exhibit is correct and other options should be explored.
B. The "VLAN / Tunnel" setting must allow All Vlans.
C. The "Traffic Group" setting must use a floating Traffic Group.
D. The "Port Lockdown" setting is preventing the SNMP server from polling data from the BIG-IP.

正解：D

解説：
The exhibit shows aSelf IPwith:
* VLAN:Data
* Port Lockdown:Allow None
Impact of "Allow None" on SNMP
When a Self IP is configured with:
Port Lockdown: Allow None
the BIG-IP blocksallservices and ports except a few hardcoded HA communication ports.
This means:
* UDP/161 (SNMP)is blocked
* UDP/162 (SNMP traps)is blocked
* The SNMP server cannot poll or receive data from the BIG-IP through this Self IP SNMP relies on access through the Self IP if out-of-band (mgmt interface) is not used.
Thus, the issue is directly caused byPort Lockdown = Allow None, which prevents SNMP communication.
Why the other options are incorrect:
B). Traffic Group must use a floating Traffic Group
* SNMP polling doesnotrequire floating Self IPs.
* Floating groups apply to HA failover IPs, not SNMP functionality.
C). VLAN/Tunnel must allow All VLANs
* Self IPs are always bound to a VLAN; SNMP doesnotrequire All VLANs.
* As long as the Self IP belongs to a reachable VLAN, SNMP can work.
D). Configuration is correct
* It is not correct:Allow Noneblocks SNMP and is the problem.

質問 # 50
A BIG-IP Administrator is responsible for deploying a new software image on an F5 BIG-IP HA pair and has scheduled a one-hour maintenance window.
With a focus on minimizing service disruption, which of the following strategies is the most appropriate?

A. Update the active node first, reboot to the newly updated boot location and verify functionality, then push the update from the active to the standby node and reboot the standby node.
B. Reset the Device Trust, apply the update to each node separately, reboot both nodes, then re-establish the Device Trust.
C. Update the standby node first and reboot it to the newly updated boot location, failover to the newly updated node and verify functionality. Repeat the upgrade procedures on the next node, which is now in standby mode.
D. Update both nodes in the HA pair, then reboot both nodes simultaneously to ensure they run the same software version.

正解：C

解説：
For BIG-IP high-availability (HA) pairs, F5's recommended upgrade workflow prioritizesservice continuity, predictable failover, andminimal downtime. The established best-practice sequence is:
* Upgrade the standby unit first
* Because the standby device is not passing traffic, upgrading and rebooting it does not impact production.
* Boot the standby unit into the newly installed version
* Once online, the administrator verifies basic health, device sync status, cluster communication, and module functionality.
* Perform a controlled failover to the upgraded unit
* Traffic shifts to the newly upgraded device, allowing validation of the configuration and operational behavior under real traffic loads.
* Upgrade the second device (now standby)
* The previously active device becomes standby after failover, allowing it to be safely upgraded and rebooted without interruption.
This phased approach ensures only one device is unavailable at a time, allowing continuous traffic flow throughout the upgrade process.
Why the Correct Answer is C
OptionCexactly matches F5's documented production-safe upgrade method:
* Upgrade thestandbynode first
* Reboot into new image
* Failover to upgraded device
* Validate
* Upgrade the remaining (now-standby) device
This procedure minimizes risk and traffic disruption.
Why the other options are incorrect:
A). Upgrade the active node first
* Upgrading the active device requires removing it from service and failing over abruptly. This is not recommended and increases service disruption risk.
B). Resetting device trust
* Resetting trust is unnecessary and can disrupt configuration sync, peer communication, and cluster operation. It is not part of any standard upgrade workflow.
D). Upgrading and rebooting both nodes simultaneously
* This would causetotal outage, because both HA members would be unavailable at the same time.

質問 # 51
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