Which feature of Cisco Nexus Dashboard permits users to switch between site controllers of Cisco ACI?

Multifactor authentication (MFA) enhances login security but does not directly provide the functionality to switch between multiple controllers without re-authentication after the initial login.

Single Sign-On (SSO) is a core feature of Cisco Nexus Dashboard that allows users to authenticate once and then gain access to multiple managed systems, including different Cisco ACI APIC clusters, without needing to re-enter credentials for each site. This facilitates switching between site controllers for centralized management.

Air-gap support refers to managing isolated networks and is unrelated to the ability to switch between active site controllers within a connected environment.

Cloud-site onboarding is the process of integrating cloud-based sites with Nexus Dashboard, which is distinct from managing multiple on-premises ACI site controllers via a single login.