Which of the following is a characteristic of 2G mobile networks?
Utilizes CDMA
Support for multimedia messaging (MMS)
Operating frequency range of 2.4 GHz
Enhanced security through WPA3 encryption
Maximum data transfer rate of 1 Mbps
2G (Second Generation) mobile networks were the first digital cellular systems introduced, providing better voice quality and more efficient use of the available bandwidth compared to 1G analog systems. One of the key technologies used in 2G networks is CDMA (Code Division Multiple Access), which allows multiple users to share the same frequency band simultaneously by assigning unique codes to each conversation. This technology is different from GSM (Global System for Mobile Communications), which uses TDMA (Time Division Multiple Access). The use of CDMA in 2G networks was a significant advancement in mobile communications.
2G is a short notation for second-generation cellular network, a group of technology standards employed for cellular networks. 2G was commercially launched on the GSM standard in Finland by Radiolinja (now part of Elisa Oyj) in 1991. After 2G was launched, the previous mobile wireless network systems were retroactively dubbed 1G. While radio signals on 1G networks are analog, radio signals on 2G networks are digital, though both systems use digital signaling to connect cellular radio towers to the rest of the mobile network system. 2G was superseded by 3G technology. The most common 2G technology was the time-division multiple access (TDMA)-based GSM standard, used in most of the world outside Japan. In North America, Digital AMPS (IS-54 and IS-136) and cdmaOne (IS-95) were dominant, but GSM was also used. In Japan the ubiquitous system was Personal Digital Cellular (PDC) though another, Personal Handy-phone System (PHS), also existed.Three primary benefits of 2G networks over their 1G predecessors were: Digitally encrypted phone conversations, at least between the mobile phone and the cellular base station but not necessarily in the rest of the network. Significantly more efficient use of the radio frequency spectrum enabling more users per frequency band. Data services for mobile, starting with SMS text messages then expanding to Multimedia Messaging Service (MMS). With General Packet Radio Service (GPRS), 2G offers a theoretical maximum transfer speed of 40 kbit/s (5 kB/s). With EDGE (Enhanced Data Rates for GSM Evolution), there is a theoretical maximum transfer speed of 384 kbit/s (48 kB/s).
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