Respuesta :

The protocol that should be used for establishing a secure network connection is SSH.  

The following information is to be considered:  

  • SFTP is secure also it is a protocol for file transferring that applied SSH.
  • IP, FTP, and DHCP should not be for safety purposes as they are not secure.
  • SSH is a secured connection for the remote sites so here the SSH protocol should be used.

Therefore we can conclude that The protocol that should be used for establishing a secure network connection is SSH.