How does the Selenium Grid2 load balancing method work?

Question

I am using Selenium Grid2 to execute Selenium Scripts remotely.

Does anyone know if a Grid2 hub really loads workload balancing?

For example ... I have a Grid hub with two registered nodes, both registered with the same capabilities (5 firefox, 5 chrome). I see that all tests are directed to the first registered node, even if the second node does not work at all.

Does this mean that only after the node is full on it, then the concentrator will redirect the task to the second node and so on?

Thanks and respect, Rodrigo.