3Com TokenLink VelocityTM XL PCI Network Interface Card manual Glossary, Bus mastering

GLOSSARY

ACPI

Advanced Configuration and Power Interface. A power management specification developed by Microsoft, Toshiba, and Intel. ACPI, which will be part of Windows 98, enables the operating system to control the amount of power sent to each device attached to the computer. ACPI will enable manufacturers to produce computers that automatically power up as soon as you touch the keyboard. With ACPI, the operating system can turn off peripheral devices, such as CD-ROM players, when they are not in use. See also OnNow/(ACPI).

bus

A common pathway across which data can travel within a computer. This pathway is used for communication and can be established between two or more computer elements. In any computer, data travels over one or more buses between memory, the CPU, and peripheral components like NICs, video display adapters, SCSI controllers, and disk drives.

bus mastering

A bus design that allows NICs to move data and access the computer’s memory and peripherals without support from the CPU.

CAU

Controlled access unit. An intelligent hub.

Class of Service (or Traffic Prioritization)

A 3Com DynamicAccess feature that helps to optimize network performance by letting you prioritize your applications for efficient network access. High-priority tokens are requested when the network transmits data for selected applications.