| A | B |
| VPN | (Virtual Private Network) A private network that is configured within a public network |
| dns | (Domain Name System) 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. |
| brouter | acts as a router and a bridge |
| gateway | A computer that performs protocol conversion between different types of networks or applications. |
| rj-45 | Registered Jack-45) A telephone connector that holds up to eight wires. |
| cat-5 | ? |
| bnc connector | (Bayonet Neill-Concelman or British Naval Connector) A commonly used plug and socket for audio, video and networking applications. |
| fiber optic cable | ? |
| network adapter | 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. |
| tcp/ip | (Transmission Control Protocol/Internet Protocol) A communications protocol developed under contract from the U.S. Department of Defense to internetwork dissimilar systems |
| ip adress | (Internet Protocol address) The address of a computer attached to a TCP/IP network. Every client and server station must have a unique IP address. |
| ipx | (Internetwork Packet EXchange) A NetWare communications protocol used to route messages from one node to another. |
| spx | Sequenced Packet EXchange) The NetWare communications protocol used to control the transport of messages across a network. |
| netbeui | (NetBIOS Extended User Interface) Pronounced "net-booey." The transport layer for NetBIOS. NetBIOS and NetBEUI were originally part of a single protocol suite that was later separated. |