| A | B |
|---|
| address | Data structure or logical convention used to identify a unique entity, such as a particular process or network device |
| collision domain | the network area within which frames that have collided are propagated |
| CSMA/CD | Media-access mechanism wherein devices ready to transmit data first check the channel for a carrier. If no carrier is sensed for a specific period of time, a device can transmit |
| data link layer | provides reliable transit of data across a physical link; concerned with physical addressing, network topology, line discipline, error notification, ordered delivery of frames, and flow control |
| encapsulation | The wrapping of data in a particular protocol header |
| frame | Logical grouping of information sent as a data link layer unit over a transmission medium |
| hexadecimal | A number representation using the digits 0 through 9, with their usual meaning, plus the letters A through F to represent the values of 10 to 15 |
| IEEE | Professional organization whose activities include the development of communications and network standards. |
| LLC (Logical Link Control) | Higher of the two data link layer sublayers defined by the IEEE; handles error control, flow control, framing, and MAC-sublayer addressing |
| MAC (Media Access Control) | Lower of the two sublayers of the data link layer defined by the IEEE; handles access to shared media, such as whether token passing or contention will be used |
| Token Ring | Token-passing LAN developed and supported by IBM; runs at 4 or 16 Mbps over a ring topology |
| Ethernet | Baseband LAN specification invented by Xerox Corporation and developed jointly by Xerox, Intel, and Digital Equipment Corporation; uses CSMA/CD and run over a variety of cable types at 10 Mbps |
