Can I mix connection types in one playbook?

Yes, you can mix connection types in one playbook, but you cannot mix them within a single play. Each play in the playbook can specify a different connection type for the hosts it manages.

For example, you can have one play that connects to Linux hosts using SSH and another play that connects to Windows hosts using WinRM, all within the same playbook:

- hosts: linux_servers
  connection: ssh
  tasks:
    - name: Run a command on Linux servers
      command: uptime

- hosts: windows_servers
  connection: winrm
  tasks:
    - name: Run a command on Windows servers
      win_command: echo "Hello, Windows!"

In this example, the playbook effectively manages both Linux and Windows servers, each using the appropriate connection method for its environment. However, within a single play, all hosts must use the same connection type.