The correct answer is: C. GSM and IS-136 both.
GPRS (General Packet Radio Service) and EDGE (Enhanced Data Rates for GSM Evolution) are two technologies that allow for faster data transfer over 2G cellular networks. GPRS was first deployed in 1997, and EDGE was deployed in 2003. Both technologies are based on the GSM (Global System for Mobile Communications) standard, which is the most widely used 2G standard in the world.
IS-136 (Integrated Services Digital Network – 136) is another 2G standard that was developed by the Telecommunications Industry Association (TIA). IS-136 is used primarily in North America and South America.
GPRS and EDGE can be used on both GSM and IS-136 networks. However, they are not compatible with PDC (Personal Digital Cellular), which is a 2G standard that was developed in Japan.
Here is a brief explanation of each option:
- Option A: GSM only. GPRS and EDGE can be used on both GSM and IS-136 networks. Therefore, this option is incorrect.
- Option B: IS-136 only. GPRS and EDGE can be used on both GSM and IS-136 networks. Therefore, this option is incorrect.
- Option C: GSM and IS-136 both. GPRS and EDGE can be used on both GSM and IS-136 networks. Therefore, this option is correct.
- Option D: PDC. GPRS and EDGE are not compatible with PDC. Therefore, this option is incorrect.