1xRTT
1xRTT is a data transmission system used on CDMA networks that allows for connetion speeds of up to a theoretical limit of 144kbps in most implementations. Real world usage is typically much slower, though, coming in at somewhere around 80kbps. 1xRTT is often referred to as a 2.5G technology like GPRS, though it is officially a 3G technology according to the ITU's IMT-2000 spec.
2.5G
2.5G is a sometimes used term that refers to GPRS class wireless data connectivity. It is not a formal standard.
2.75G
2.75G is a term occasionally used to refer to EDGE data connectivity, implying that is is faster than GPRS (sometimes called 2.5G), but slower than typical 3G networks. The truth of the matter, however, is that EDGE is an official ITU ratified 3G technology. Typical EDGE implementations generally do not obtain 3G data rates, though, leading people to call it 2.75G.
2G
2G is short for Second Generation, the name usually given to original GSM, CDMA, and TDMA networks. 1G, a term rarely used, would refer to the original analog (AMPS) type mobile networks first used in the early 1980s.
Also known as: "second generation"
3G
3G, or Third Generation, is a somewhat generic term for network technologies that the ITU classifies as part of their IMT-2000 specification. Generally, wireless network technologies must be able to provide a mobile device with a downlink connection speed of 384kbps in order to be considered a 3G technology. The most used 3G technologies are WCDMA, CDMA 1xEV-DO, and, technically, EDGE and CDMA 1xRTT.
Also known as: "third generation"
4G
4G is the term used to refer to the next wave of as yet unknown mobile technologies that will be used to replace current 3G networks. It is expected that WiMAX will be one of the favored 4G technologies.
Also known as: "fourth generation"
802.11b
IEEE standard 802.11b defines a Wireless LAN (WLAN) technology that is capable of achieving up to 11Mbps of bandwidth between two devices. It is part of the 802.11 group of technologies that define WiFi.
802.11g
IEEE standard 802.11g defines a Wireless LAN (WLAN) technology that is capable of achieving up to 54Mbps of bandwidth between two devices. It is part of the 802.11 group of technologies that define WiFi.
1xRTT is a data transmission system used on CDMA networks that allows for connetion speeds of up to a theoretical limit of 144kbps in most implementations. Real world usage is typically much slower, though, coming in at somewhere around 80kbps. 1xRTT is often referred to as a 2.5G technology like GPRS, though it is officially a 3G technology according to the ITU's IMT-2000 spec.
2.5G
2.5G is a sometimes used term that refers to GPRS class wireless data connectivity. It is not a formal standard.
2.75G
2.75G is a term occasionally used to refer to EDGE data connectivity, implying that is is faster than GPRS (sometimes called 2.5G), but slower than typical 3G networks. The truth of the matter, however, is that EDGE is an official ITU ratified 3G technology. Typical EDGE implementations generally do not obtain 3G data rates, though, leading people to call it 2.75G.
2G
2G is short for Second Generation, the name usually given to original GSM, CDMA, and TDMA networks. 1G, a term rarely used, would refer to the original analog (AMPS) type mobile networks first used in the early 1980s.
Also known as: "second generation"
3G
3G, or Third Generation, is a somewhat generic term for network technologies that the ITU classifies as part of their IMT-2000 specification. Generally, wireless network technologies must be able to provide a mobile device with a downlink connection speed of 384kbps in order to be considered a 3G technology. The most used 3G technologies are WCDMA, CDMA 1xEV-DO, and, technically, EDGE and CDMA 1xRTT.
Also known as: "third generation"
4G
4G is the term used to refer to the next wave of as yet unknown mobile technologies that will be used to replace current 3G networks. It is expected that WiMAX will be one of the favored 4G technologies.
Also known as: "fourth generation"
802.11b
IEEE standard 802.11b defines a Wireless LAN (WLAN) technology that is capable of achieving up to 11Mbps of bandwidth between two devices. It is part of the 802.11 group of technologies that define WiFi.
802.11g
IEEE standard 802.11g defines a Wireless LAN (WLAN) technology that is capable of achieving up to 54Mbps of bandwidth between two devices. It is part of the 802.11 group of technologies that define WiFi.
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