CCNA Install Initial Config Upgrade Questions — Page 2 of 2

MCQmedium

Which action should an administrator perform after a successful software upgrade but before putting the device back into production?

A.Test production traffic and check system logs.

B.Immediately initiate a failover to the peer.

C.Re-install the license files.

D.Delete the old configuration backups.

AnswerA

Verifying that applications function correctly and checking logs for errors or warnings ensures the upgrade did not introduce regression issues. This proactive testing approach identifies problems early, allowing for a quick rollback if necessary before users are impacted by unexpected service behavior.

Why this answer

Verification is the final, crucial step of any upgrade process. Testing application traffic, checking system logs for errors, and validating synchronization status ensure the upgrade was not only successful in terms of the install process but also that the services are behaving as expected. This minimizes the risk of post-upgrade production issues that could impact end-users, reflecting an expert approach to maintenance and lifecycle management.

Exam trap

Candidates often assume that a successful software installation means the device is ready, neglecting vital post-upgrade verification steps like testing live application traffic.

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MCQhard

Refer to the exhibit. An administrator receives this error while installing a new version. What is the recommended way to resolve this space issue?

A.Delete old, unused software images in the boot locations.

B.Reformat the hard drive.

C.Increase the disk partition size via CLI.

D.Disable the logging service.

AnswerA

BIG-IP stores multiple software versions as images on the disk. Deleting old, unused images is the standard, safest way to reclaim space for a new installation. This allows the administrator to maintain the current version while having enough capacity to stage the new, larger software update.

Why this answer

Disk space management is a frequent operational challenge. By removing unused software images from the boot partitions, the administrator clears the necessary space to extract the new image. This process ensures the system can complete the installation without needing to reformat or wipe existing data, maintaining stability during the upgrade cycle which is essential for environments with limited storage capacity on older hardware.

Exam trap

Candidates often choose to reformat the entire disk or perform a factory reset, overlooking the built-in capability to clean up old, unneeded software boot location images.

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MCQeasy

Which component of the BIG-IP initial setup is used to ensure that administrative access to the system is restricted to trusted management subnets?

A.Self-IP allow list

B.Management port allowed addresses

C.Route table configuration

D.VLAN tagging policies

AnswerB

This setting directly controls which source IP addresses are permitted to connect to the BIG-IP management interface. By restricting access to internal or VPN subnets, the administrator significantly hardens the device against brute-force attacks and unauthorized access attempts aimed at the management plane, which is a core security requirement.

Why this answer

The 'Management IP' configuration includes the ability to set packet filter rules or restrict GUI/SSH access via management allowed lists. Limiting access ensures that only specific, authorized subnets can interact with the management plane. This is a vital security best practice, preventing unauthorized actors from attempting to log in to the management interface of the F5 device from public or untrusted network segments.

Exam trap

Candidates often focus only on the management IP and ignore access restrictions. Leaving the management interface open to all subnets is a major security vulnerability that should be mitigated immediately.

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MCQhard

Refer to the exhibit. An administrator receives this error while running a TMSH script to provision modules. What is the likely cause?

A.Insufficient physical memory is installed.

B.The provisioning level is set to an unsupported value.

C.The license does not support this module.

D.The management interface is down.

AnswerB

This error indicates that the administrator entered a level name that does not match the allowed options for the specific module. For instance, attempting to set a level that doesn't exist for that module will trigger this error. Correcting the script to use valid values will allow the provisioning to proceed.

Why this answer

Provisioning errors often stem from invalid resource levels being assigned to a module. Each module has specific requirements and allowed values (e.g., nominal, dedicated, none). When an invalid setting is provided, the system rejects the command to prevent system instability.

Understanding the resource allocation model is essential to ensure that the BIG-IP appliance operates within its performance limits while enabling the required application delivery services for the enterprise environment.

Exam trap

Candidates often confuse provisioning levels with feature licenses. They attempt to set invalid resource levels (like 'dedicated' for modules that don't support it), which the system rejects for stability reasons.

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MCQmedium

When configuring a new VLAN on a BIG-IP, what happens if the VLAN is not assigned to any interfaces?

A.The system will generate a critical alarm.

B.The VLAN will be created but cannot pass traffic.

C.The system will automatically assign the default management interface.

D.The VLAN creation will fail immediately.

AnswerB

An interface is the physical or virtual conduit for a VLAN. Without an interface, a VLAN has no way to interact with the external world. It remains a logical construct inside the BIG-IP memory, but it cannot bridge any traffic, effectively rendering the VLAN useless for client-server packet processing.

Why this answer

A VLAN that has no assigned interfaces is effectively an internal-only construct. While it can exist in the configuration, it cannot receive or transmit traffic to the external network because there is no physical or virtual path for the packets to enter or leave the BIG-IP system. This is a common configuration state when creating internal-only segments, but it prevents the VLAN from fulfilling its role as a bridge for production traffic.

Exam trap

Candidates often assume that creating a VLAN automatically connects it to the physical network, forgetting that a VLAN definition is purely logical until it is explicitly mapped to one or more physical interfaces.

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