The correct answer is 'True.' When users experience intermittent connectivity issues following an infrastructure upgrade, it is likely that the network configuration could have been disrupted during the process. This emphasizes the importance of examining recent changes when troubleshooting. Network settings, compatibility with existing systems, or even physical connections could have been affected. Validating the integrity of the network configuration post-upgrade is a standard troubleshooting step to ensure all components are correctly aligned and functioning as intended.