Avaya C460 manual Domain, Dot1Q, Duplex Mode, End System, Ethernet

Glossary

different IP address every time it connects to the network. In some systems, the device's IP address can even change while it is still connected. DHCP also supports a mix of static and dynamic IP addresses.

Domain

A group of computers and devices on a network that are administered as a unit with common rules and procedures.

Dot1Q

Standard for VLAN tagging under the IEEE 802.1Q VLAN standard.

DRU

Domain Resource Unit. The unit of measure of resources available in a Avaya M770 Device DomainX.

Duplex Mode

The state of the device with regard to simultaneous transmission and reception of information. In Full Duplex Mode, the device or circuit permits simultaneous transmission and reception. (This is also known as bisynchronous communication.) In Half Duplex Mode, the device or circuit does not permit simultaneous transmission and reception. (This is also known as asynchronous communication.)

End System

An end-user device on a network. Also used to denote a non-routing host or node in an OSI network.

ESI

End System Identifier. A portion of a network address that identifies the end system.

Ethernet

One of the most widely implemented LAN standards, Ethernet is standardized as IEEE 802.3. Ethernet uses the CSMA/CD access method to handle simultaneous demands and supports data transfer rates of 10 Mbps. A newer version of Ethernet, called 100Base-T (or Fast Ethernet), supports data transfer rates of 100 Mbps. The newest version, Gigabit Ethernet, supports data rates of 1 Gigabit per second.

FCS

Frame Check Sequence. A field added to a frame for error-control purposes.

FDDI

Fiber Distributed Data Interface. A set of ANSI protocols for sending digital data over fiber optic cable. FDDI networks are token-passing networks, and support data rates of up to 100 Mbps. FDDI networks are typically used as backbones for wide-

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