| A | B |
|---|
| VPN | Virtual Private network a private network that is configured with in a public network |
| DNS | Domain Name System DNS server maintains a database of domain names (host names) and their corresponding IP addresses |
| 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. Available for both electronic and optical signals, repeaters are used extensively in long distance transmission |
| Bridge | A device that connects two LAN segments together, which may be of similar or dissimilar types, such as Ethernet and Token Ring. A bridge is inserted into a network to segment it and keep traffic contained within the segments to improve performance |
| Brouter | A communication device that functions as tobth a bridge and a router depending on ehich function is needed |
| Gateway | A computer that performs protocol conversion between different types of networks or applications. For example, a gateway can convert a TCP/IP packet to a NetWare IPX packet |
| 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 |
| Cat5 | . 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 Connnector | BNCs connect two-wire coaxial cable (signal and ground) using a bayonet mount |
| Fiber-optic cable | A cable that ransfers pulses of ligh instead of electrical signals |
| Network adapter | a printed circuti board that plugs into both the clients personal computer or workstations and servers and controls the exchange of data between them |
| Half duplex | Communicationtype in which communication can occur in two directons but only in one direction at a time |
| Full deuplex | Communication type in which communication can occur in two directions at the same time |
| TCP/IP | Stands fo Transmission Control Protoco/internet protocol |
| IP address | A unique 4-byte number that identifies a node on a TCP/IP network. |
| IPX | Stands for internetwork packet eXchange. Netware commucications protocol used to route messages from one node to another |
| SPX | Stands for Sequenced Packet Exchange. The Netware communications protocol used to control the transport of messages across a network |
| NetBEUI | Stands for NetBios Echanced User Interface |
