The present invention provides a method of determining or selecting a path for transmitting data in packets in an Internet Protocol communication network and a communication network using the method. The method comprises predetermining a limited number of paths by repeatedly applying a single criterion selection method to all of the paths in the network concerned, using different first criteria, and then determining one or more given paths from said limited number of predetermined paths by comparing them with each other on the basis of two or more conditional criteria and then classifying them.