What is the term used by ITU for a set of global standards of 3G systems?

IMT 2000
GSM
CDMA
EDGE

The correct answer is A. IMT 2000.

IMT 2000 is the term used by the International Telecommunication Union (ITU) for a set of global standards of 3G systems. It is a third-generation mobile telecommunications technology that offers a wide range of services, including high-speed data transfer, video calling, and mobile internet access.

GSM is a second-generation mobile telecommunications technology that is still widely used in many parts of the world. It is a digital technology that offers voice and data services.

CDMA is a second-generation mobile telecommunications technology that is used in some parts of the world. It is a digital technology that offers voice and data services.

EDGE is a technology that is used to improve the performance of GSM networks. It offers higher data rates than standard GSM.

IMT 2000 is a more advanced technology than GSM, CDMA, and EDGE. It offers a wider range of services and higher data rates.