maximum ssh connections limit in ansible

I want to connect more no of connections from one node to multiple hosts.So is there any limit of ssh connections ? and what is the maximum no of ssh connections from one node to multiple hosts?
If it exists how to increase maximum no of connections and any dependency from ufw?

connections will be limited by resources (cpu, ram, network
bandwidth), there is no setting on the clients side limiting
connections. Since ansible should only be opening one connection per
target server, there should be no need to adjust the number of
connections on the target.