| A | B |
|---|
| VPN | Virtual Private Network. A private network that is configured within a public network. |
| DNS | Domain Name Service. This will map a TCP/IP number, such as 172.16.4.245, to a more easily remembered name. |
| Hub | A hub is an electronic device that connects several computers or networks together. |
| Repeater | A communications device that amplifies (analog) or regenerates (digital) the data signal in order to extend the transmission distance. |
| Bridge | Controls the flow of info. between LAN segments or networks. |
| Brouter | A communication device that functions as both a bridge and a router. |
| Gateway | A protocol converter that supports communication between networks that use different protocols. |
| 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 | New wiring connection uses 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. BNCs connect two-wire coaxial cable using a bayonet mount. |
| Fiber-Optics Cable | Carries pulses of laser light which are encoded with digital signals. |
| 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. Two-way radio was the first to use half-duplex, for example, while one party spoke, the other party listened. |
| Full Duplex | Transmitting and receiving simultaneously. |
| TCP/IP | It's the suite of communications protocols used to connect hosts on the Internet and is now the global standard for communications. |
| IP Address | Identifies a computer or device on a TCP/IP network. Every computer must have an IP address. |
| IPX | Internet Packet Exchange. It works at the network layer 3 of the OSI model. |
| SPX | Sequenced Packet Exchange. Is the usual Transport Layer 4 protocol to guarantee that the packets sent out IPX can be accurately assembled into the entire message by the destination node. |
| NetBEUI | The transport layer for NetBIOS. NetBIOS and NetBEUI were originally part of a single protocol suite that was later separated. |
