Technology / Computers Glossary

1000BaseT: 1000Mbps CSMA/CD Ethernet LAN that operates on Category 5e UTP/STP cabling and utilizes the star configuration. Most common network solution.

100BaseT: 100Mbps CSMA/CD ethernet LAN that operates on Category 5 UTP/STP cabling. Utilizes the star configuration.

10Base2: IEEE standard for baseband Ethernet at 10Mbps over RG-58 coax cable to a max distance of 185 meters. Also known as Thinnet, highly uncommon in modern network environments.

10Base5: IEEE standard for baseband Ethernet at 10Mbps over heavy coax cable for a maximum distance of 500 meters. Also called Thicknet, rarely seen in modern network environments.

10BaseT: 10Mbps (Megabits per second) CSMA/CD (Carrier Sense Multiple Access with Collision Detection) LAN that runs on Category 3 and better UTP/STP (unshielded twisted pair / shielded twisted pair) . . . View Full Definition

128K: Uncommon modem operating speed, rarely seen, the intended result of signal acceleration.

28.8K: Lowest end operating speed for modems as set by the FCC. Operates at 28.8 Kbps.

32-bit-16-bit: There are many advantages that 32 bit has over the 16 bit applications. 32 bit application have their own address space which creates a stable environment for a computer system. Whereas the . . . View Full Definition

56K: Most common modem (modulation/demodulation) speed. Generic term for modems that can receive data at 56Kbps (kilobits per second).

802.1: Standard defining Network Bridging. Bridges also known as Layer 2 Switches because they operate at the Data Link layer of the OSI model.

802.11a: Standard defining wireless networking that operates on the 5GHz band at a speed of 54Mbps. Shorter range than 802.11b/g standards.

802.11b: Standard defining wireless networking that operates on the 2.4Ghz band at the speed of 11Mbps.

802.11g: Standard defining wireless networking that operates on the 2.4Ghz band at the speed of 54Mbps.

802.11n: Standard defining wireless networking that improves upon prior standards by using Multiple Input Multiple Output (MIMO) technology to achieve data transmission speeds nearing 600Mbps. Utiliz . . . View Full Definition

802.15: Standard defining the Personal Area Network (PAN) and Wireless PAN, a network consisting of connected devices within a few meters of each other. Can include Bluetooth, Z-Wave, ZigBee, and US . . . View Full Definition

802.16: Standard defining Broadband Wireless Access, aka WiMAX technology.

802.2: Standard defining Logical Link Control (LLC), which provides flow and error control over the upper Data Link layer of the OSI model.

802.3: Standard defining wired Ethernet. Typically LAN technology with some WAN applications. Works on the Physical and Media Access Control (MAC) layers of the OSI model.

Absolute Address: The exact memory location of data or a specific location within a device.

Absolute Reference: A formulated cell reference that will not adjust when used to calculate the sum of specific cells. Most commonly used in spreadsheet applications.

Accelerated Graphics Port (AGP): A dedicated interface between the video adapter and the motherboard's North Bridge. AGP is 32 bits wide and runs at 66MHz base speed. It can transmit 1, 2, 4, or 8 bits per cycle - marketed . . . View Full Definition

Access Light: The LED on the front of a device indicating that it is reading or writing data.

Access Point: A networking connection device that is also known as the base station. This is a wireless hardware connection device that connects to a wired network to create wireless operation. Its point . . . View Full Definition

Access Time: The time that elapses from the moment information is requested and the information is delivered. Usually given in nanoseconds (ns) for memory chips and milliseconds (ms) for disk drives.

Active Matrix: A type of LCD (liquid crystal display) structure that is actively controlled by a diode or transistor. This allows for each pixel to be independently controlled which produces excellent colo . . . View Full Definition

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