| A | B |
|---|
| VPN | A private network that is configured within a public network |
| DNS | Name resolution software that lets users locate computers on a UNIX network or the Internet (TCP/IP network) by domain name. |
| HUB | A central connecting device in a network that joins communications lines together in a star configuration |
| REPEATER | A communications device that amplifies (analog) or regenerates (digital) the data signal in order to extend the transmission distance. |
| BRIDGE | To cross from one circuit, channel or element over to another. A device that connects two LAN segments together, which may be of similar or dissimilar types, such as Ethernet and Token Ring |
| BROUTER | A communications device that provides the functions of a bridge and router |
| RJ-45 | A telephone connector that holds up to eight wires. RJ-45 plugs and sockets are used in Ethernet and Token Ring Type 3 devices |
| CAT 5 | The majority of new wiring installations use Category 5 UTP wire in order to be able to run or upgrade to the faster network technologies that will require it. |
| BNC CONNECTOR | A commonly used plug and socket for audio, video and networking applications. |
| FIBER-OPTIC CABLE | A technology that uses glass (or plastic) threads (fibers) to transmit data. |
| NETWORK ADPTER | A printed circuit board that plugs into both the clients (personal computers or workstations) and servers and controls the exchange of data between them. |
| HALF DUPLEX | The transmission of data in both directions, but only one direction at a time |
| FULL DUPLEX | Transmitting and receiving simultaneously. In pure digital networks, this is achieved with two pairs of wires. |
| TCP/IP | A communications protocol developed under contract from the U.S. Department of Defense to internetwork dissimilar systems |
| IP ADDRESS | The address of a computer attached to a TCP/IP network |
| IPX | A NetWare communications protocol used to route messages from one node to another |
| SPX | The NetWare communications protocol used to control the transport of messages across a network. |
| NETBEUI | The transport layer for NetBIOS. |
