Which of the following situations would present the lowest security risk if a shared account were to be used?

A situation like guest Wi-Fi access, which only allows users to access the internet without any access to corporate resources, poses minimal security risk to the corporate network. Therefore, it is often implemented using a common or shared account. In contrast, tech support personnel typically have significant access to corporate network resources, and even in relatively low-access scenarios, it is crucial to identify who is logging in and accessing what resources. Thus, any level of access to corporate resources should have its own individual login account.