160GLOSSARY
DNS | Domain Name System. This system maps a numerical Internet Protocol |
| (IP) address to a more meaningful and |
| you need to access another device on your network, you enter the |
| name of the device, instead of its IP address. |
Ethernet | A LAN specification developed jointly by Xerox, Intel and Digital |
| Equipment Corporation. Ethernet networks use CSMA/CD to transmit |
| packets at a rate of 10 Mbps over a variety of cables. |
Ethernet address | See MAC address. |
Fast Ethernet | An Ethernet system that is designed to operate at 100Mbps. |
FTP | File Transfer Protocol. A protocol based on TCP/IP for reliable file |
| transfer. |
full duplex | A system that allows packets to be transmitted and received at the |
| same time and, in effect, doubles the potential throughput of a link. |
gateway | See router. |
half duplex | A system that allows packets to transmitted and received, but not at |
| the same time. Contrast with full duplex. |
HTTP | Hypertext Transfer Protocol. This is a set of rules for exchanging files |
| (text, graphic images, sound, video, and other multimedia files) on the |
| World Wide Web. |
IETF | Internet Engineering Task Force. An organization responsible for |
| providing engineering solutions for TCP/IP networks. In the network |
| management area, this group is responsible for the development of the |
| SNMP protocol. |
Intranet | An Intranet is an organisation wide network using Internet protocols |
| such as web services, TCP/IP, HTTP and HTML. An Intranet is normally |
| used for internal communication and information, and is not accessible |
| to computers on the wider Internet. |
IP | Internet Protocol. IP is a layer 3 network protocol that is the standard |
| for sending data through a network. IP is part of the TCP/IP set of |
| protocols that describe the routing of packets to addressed devices. |
IP address | Internet Protocol address. A unique identifier for a device attached to a |
| network using TCP/IP. The address is written as four octets separated |
