Node Locked Vs Named User License

Hi. I need clarification on Node Locked Vs Named User License.

  1. Do Attended Named User License definitely require Orchestrator?
  2. Do Attended Concurrent User License require Orchestrator?
  3. Can we transfer named user license from one user to another user?
  4. In case of Attended Node Locked License, can we transfer the license from one machine to another (transfer between any of machine/AWS/Azure cloud)?