| 10BaseF | 10-Mbps baseband Ethernet specification that refers to the 10BaseFB, 10BaseFL, and 10BaseFP standards for Ethernet over fibre-optic cabling. |
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| 10BaseFB | 10-Mbps baseband Ethernet specification using fibre-optic cabling. 10BaseFB is part of the IEEE 10BaseF specification. It is not used to connect user stations, but instead provides a synchronous signalling backbone that allows additional segments and repeaters to be connected to the network. 10BaseFB segments can be up to 1.24 miles (2000 meters) long. |
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| 10BaseFL | 10-Mbps baseband Ethernet specification using fibre-optic cabling. 10BaseFL is part of the IEEE 10BaseF specification and, while able to interoperate with FOIRL, is designed to replace the FOIRL specification. 10BaseFL segments can be up to 3,280 feet (1,000 meters) long if used with FOIRL, and up to 1.24 miles (2,000 meters) if 10BaseFL is used exclusively. |
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| 10BaseFP | 10-Mbps fibre-passive baseband Ethernet specification using fibre-optic cabling. 10BaseFP is part of the IEEE 10BaseF specification. It organizes a number of computers into a star topology without the use of repeaters. 10BaseFP segments can be up to 1,640 feet (500 meters) long. |
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| 10BaseT | An implementation of the Ethernet IEEE standard on 24-gauge, unshielded twisted-pair wiring, a baseband medium, at 10 megabits per second. |
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| 100BaseT | An Ethernet transmission standard operating at 100 megabits (Mbps) per second. |
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| 1000BaseT | Various technologies for transmitting Ethernet frames at a rate of a gigabit per second. Also referred to as Gigabit Ethernet (GbE or 1GigE) | |
| 2B1Q | Two Binary, One Quaternary | The line code is the ISDN and ADSL standard for transmission of two voice and data channels at 64 kbps and one data and signalling channel at 16 kbps. Provides a 2 bits per baud, 80-kbaud per second, 160-kbps transfer rate. The most common signalling method on ISDN U interfaces. |
| 2G | 2nd Generation mobile communications | |
| 2.5G | ||
| 3G | 3rd Generation mobile communications | An ITU specification for the third generation (analogue cellular was the first generation, digital PCS the second) of mobile communications technology. 3G promises increased Bandwidth, up to 384 Kbps when a device is stationary or moving at pedestrian speed, 128 Kbps in a car, and 2 Mbps in fixed applications. 3G will work over wireless air interfaces such as GSM, TDMA, and CDMA. The new EDGE air interface has been developed specifically to meet the bandwidth needs of 3G. Also referred to as CDMA2000, UMTS, W-CDMA. |
| 3GPP | 3rd Generation Partnership Project | 3rd Generation Partnership Project, defining UMTS standards |
| 3GPP2 | 3rd Generation Partnership Project 2 | Collaboration between telecommunications associations to make a globally applicable third generation (3G) mobile phone system specification within the scope of the ITU's IMT-2000 project. In practice, 3GPP2 is the standardisation group for CDMA2000. |
| 4B/5B local fibre | 4-byte/5-byte local fibre |
Fibre channel physical media used for FDDI and ATM. Supports speeds of up to 100Mbps over multimode fibre. |
| 6BONE | The Internet's experimental IPv6 network. |
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| 802.x | Set of IEEE standards for the definition of LAN protocols. |
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| 8B/10B local fibre | 8-byte/10-byte local fibre |
Fibre channel physical media that supports speeds up to 149.76 Mbps over multimode fibre. |