Explanation
The rollback plan should be updated before requesting approval again. A rollback plan is a plan for undoing a change if it causes problems, and it is an important part of any change management process. If the change advisory board did not approve the requested change due to the lack of alternative actions if implementation failed, then updating the rollback plan would be the best way to address this concern.

Explanation
Removing the user-installed antivirus software program is the best way to resolve the issue of extremely slow performance caused by installing additional real-time protection antivirus software on a PC. Having more than one antivirus software program running at the same time can cause conflicts, resource consumption and performance degradation. Uninstalling one antivirus software program and installing a different one, activating real-time protection on both antivirus software programs, enabling the quarantine feature on both antivirus software programs and launching Windows Update are not effective ways to resolve the issue. Verified References:
https://www.comptia.org/blog/why-you-shouldnt-run-multiple-antivirus-programs-at-the-same-time
https://www.comptia.org/certifications/a

Explanation
Account lockout would best mitigate the threat of a dictionary attack

Explanation
Sometimes, an OS update can cause compatibility issues with some applications that are not optimized for the new version of the OS. To fix this, the user should check if there are any updates available for the application that can resolve the issue. The user can check for application updates by following these steps:
On an Android device, open the Google Play Store app and tap on the menu icon in the top left corner.
Then tap on My apps & games and look for any updates available for the application. If there is an update, tap on Update to install it.
On an iOS device, open the App Store app and tap on the Updates tab at the bottom. Then look for any updates available for the application. If there is an update, tap on Update to install it.

Explanation
The Linux command used to install an application is sudo. The sudo command allows users to run programs with the security privileges of another user, such as the root user. This is necessary to install applications because it requires administrative privileges