Control nodes vs Worker nodes

[Mateus Passos]

Heya, as I pointed out in the last conversation, I'm new to KubeEdge and I would like to clarify some things on a conceptual level that I was not able to find on FAQ or somewhere else:

1. Kubernetes traditionally does not run other pods on the control-plane, does that mean that CloudCore must be 'set' in another node in the Kubernetes cluster?
2. Are the nodes containing CloudCore and EdgeCore exclusively control nodes? Meaning, can they contain other pods as well?
3. What is the minimum number of nodes in a Kubernetes cluster to deploy KubeEdge? 2? 4?
4. Finally, my edge environment is in a different geographical location than my cloud environment (as is the case in the real world - though this is a uni project), and also in a different network. Is there a traditional approach to make this work in KubeEdge? I am reading on Kubernetes across multiple zones and some folks online suggested setting up VPNs.

Anyways, thank you! Any help is appreciated!