The Python script provided makes a GET request to the Cisco DNA Center API to retrieve a list of network devices. The script processes the JSON response, iterates over each item in the response, and prints the hostname and management IP address of each device. The process_devices function constructs the API URL using the dnac['host']. It sends an HTTP GET request with the necessary headers, including the authentication token. The response is parsed as JSON and stored in the data variable. The script then loops through the data['response'] list, printing the hostname and managementIpAddress for each device. Reference: Cisco DevNet Associate Certification Guide: Chapter on Cisco DNA Center and its APIs. Python documentation: Working with JSON and making HTTP requests.