Final answer:
The goal of IMT-Advanced was to adopt IP packet-switched technology, marking a significant evolution from earlier mobile systems that were primarily circuit-switched.
Step-by-step explanation:
IMT-Advanced, also known as International Mobile Telecommunications Advanced, was a set of requirements set forth by the ITU (International Telecommunication Union) to standardize what would be considered 4G mobile systems. One of the key goals of IMT-Advanced was to adopt IP packet-switched technology. This was a significant move from the traditional circuit-switched networks that were predominant in the earlier generations of mobile technology. The adoption of IP packet switching technology allowed for more efficient and versatile use of network resources, suitable for the growing demand for data services.
The other options mentioned in the question reflect different aspects of mobile technology evolution. For instance, supporting both circuit-switched and packet-switched concepts or ensuring backward compatibility with 1G analog voice streams were not specific goals for IMT-Advanced. CDMA technology was associated with 2G/3G technologies, rather than being an adoption target for 4G.