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Glossary of Terms
UDS-10 User Guide 11-1
11. Glossary of Terms
Address space
A linear array of locations that a thread can access. Simple processors have only one, and these
processors are referred to as `linear' addressing.
AutoIP
AutoIP is an alternative to DHCP that allows hosts to automatically obtain an IP address in smaller
networks that may not have a DHCP server. A range of IP addresses (from 169.254.0.1 to
169.254.255.254) has been explicitly reserved for AutoIP-enabled devices. The range of AutoIP
addresses is not to be used over the Internet.
Auto-Negotiate:
Clause 28 of the IEEE 802.3u standard specifies a MAC sublayer for the identification of the speed
and duplex mode of connection being supported by a device. Support of this feature is optional for
individual vendors.
Auto-sense:
Ability of a 10/100 Ethernet device to interpret the speed or duplex mode of the attached device and to
adjust to that rate. Official term is Auto-Negotiation in Clause 28 of the IEEE 802.3u standard.
AUI:
Attachment Unit Interface. A 15-pin shielded, twisted pair Ethernet cable used (optionally) to connect
between network devices and a MAU.
Autobaud:
Automatic determination and matching of transmission speed.
Backbone:
The main cable in a network.
Bandwidth on Demand:
Feature that allows a remote access device to initiate a second connection to a particular site to increase
the amount of data transferred to that site to increase the desired threshold. The network manager
configuring the remote access server will specify a number of bits or a percentage of connection
bandwidth threshold which will trigger the secondary connection. Multilink PPP is an emerging
standard to allow this feature to be interoperable, but right now the only way to ensure correct
operation is to use devices on both end from the same vendor.