The following two features are only possible when using Docker EE and managing your Docker services using Universal Control Plane (UCP):
The HTTP routing mesh allows you to share the same network IP address and port among multiple services. UCP routes the traffic to the appropriate service using the combination of hostname and port, as requested from the client.
Session stickiness allows you to specify information in the HTTP header which UCP uses to route subsequent requests to the same service task, for applications which require stateful sessions.
Итог
Key takeaway for interview: What features are possible only under Docker Enterprise Edition in comparison to Docker Community Edition?