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NEW QUESTION # 24
An organization is performing a major release upgrade to its BIG-IP system. The system is under medium load and has enough disk space to perform the upgrade.
Which pre-upgrade task is disruptive to regular system performance and should be performed during a maintenance window? (Choose one answer)
Answer: C
Explanation:
Reactivating a BIG-IP license is a traffic-disruptive operation. During the license reactivation process, the BIG-IP system performs a configuration reload, which results in a temporary interruption of all traffic processing. Because traffic handling is affected, F5 explicitly recommends scheduling license updates during a maintenance window.
This behavior is documented in F5 Knowledge Base articles, which state that license reactivation impacts traffic and must be planned accordingly during upgrades or system changes.
The other options are not considered disruptive:
* Creating a QKView is primarily a diagnostic task and does not interrupt traffic.
* Running tmsh save sys config only saves the running configuration to disk.
* Generating a UCS is resource-intensive but does not reload configuration or interrupt traffic processing.
NEW QUESTION # 25
A BIG-IP Administrator discovers malicious brute-force attempts to access the BIG-IP device on the management interface via SSH. The BIG-IP Administrator needs to restrict SSH access to the management interface. Where should this be accomplished?
Answer: D
Explanation:
The "Management Port" is distinct from TMM data ports. Configuration for global platform-level settings, including administrative access restrictions (IP Allow lists for SSH and HTTPS) for the management port, is found under System > Platform. This is a critical Control Plane hardening step to prevent unauthorized remote access.
NEW QUESTION # 26
An organization is performing a major release upgrade to its BIG-IP system. The system is under medium load and has enough disk space to perform the upgrade.
Which pre-upgrade task is disruptive to regular system performance and should be performed during a maintenance window? (Choose one answer)
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
Reactivating a BIG-IP license is a traffic-disruptive operation. During the license reactivation process, the BIG-IP system performs a configuration reload, which results in a temporary interruption of all traffic processing. Because traffic handling is affected, F5 explicitly recommends scheduling license updates during a maintenance window.
This behavior is documented in F5 Knowledge Base articles, which state that license reactivation impacts traffic and must be planned accordingly during upgrades or system changes.
The other options are not considered disruptive:
Creating a QKView is primarily a diagnostic task and does not interrupt traffic.
Running tmsh save sys config only saves the running configuration to disk.
Generating a UCS is resource-intensive but does not reload configuration or interrupt traffic processing.
NEW QUESTION # 27
What triggers failover in an HA pair?
Answer: C
Explanation:
Failover occurs when heartbeat communication or critical resources fail.
NEW QUESTION # 28
Which log file should the BIG-IP Administrator check to determine if a specific user tried to log in to the BIG-IP Configuration Utility? (Choose one answer)
Answer: A
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
On BIG-IP systems, all authentication attempts for administrative access-including logins to the Configuration Utility (GUI)-are logged in /var/log/secure. This log file records:
Successful and failed login attempts
The username used
The authentication method (local, LDAP, RADIUS, etc.)
Access denials and PAM authentication errors
Why the other options are incorrect:
/var/log/pam/tallylog tracks account lockouts and failed attempt counters, not detailed login attempts.
/var/log/ltm logs traffic management events, not administrative authentication.
/var/log/httpd logs web server activity but does not record authentication success or failure for BIG-IP administrative users.
Therefore, the correct log file to verify whether a user attempted to log in to the BIG-IP Configuration Utility is /var/log/secure.
NEW QUESTION # 29
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