In port isolation, which statement is false?

The statement that isolated interfaces can communicate at both Layer 2 and Layer 3 is incorrect. In port isolation configurations, the primary goal is to prevent communication between isolated ports at the Layer 2 level. When port isolation is enabled, traffic is restricted such that the isolated interfaces cannot send traffic to each other at Layer 2; they become effectively invisible to one another.

Layer 3 communication is similarly affected since devices on isolated ports will not have the ability to send IP packets directly to one another, effectively preventing them from communicating across the network as well. Port isolation limits both Layer 2 (data link layer) and Layer 3 (network layer) interactions, ensuring that devices within isolated ports cannot access each other's traffic, thus enhancing security and minimizing broadcast storm risks.

The other statements correctly describe aspects of port isolation. For example, it can indeed facilitate Layer 2 isolation configurations, the port isolation feature needs to be explicitly enabled on interfaces, and commands to enable port isolation can be executed in system view, which are all essential characteristics of how port isolation operates.