Panasonic FP-D250 User Manual page 579

Data Link Layer Two of the ISO OSI model is responsible for the transmission of
information over a physical medium. After establishing the link it ensures the error-
free delivery of the information through the use of error detection, error recovery and
flow control. The contention access methods such as CSMA/CD and Token passing
are Layer Two activities.
DCE (Distributed Computing Environment) A suite of software utilities and operating
system extensions that will, in theory, create applications on networks of
heterogeneous hardware - PCs, Unix workstations, minicomputers and mainframes.
The DCE is the product of the OSF. The DCE is designed to simplify the building of
heterogeneous client/server applications and provides seven general services:
Remote Procedure Call, Security, Naming (directory), Distributed File System,
Threads, Time and PC Integration. DDE (Dynamic Data Exchange) - A Microsoft
messaging specification. When DDE-compliant applications are combined, dynamic
documents can be created which update each other as data changes.
Decompress To reverse the procedure conducted by compression software, and
thereby return compressed data to its original size and condition.
Developer In electrophotography, the developer is a consumable that acts as a
charging agent. It has magnetic properties that allows it to carry toner particles until
they are transformed to the photoconductive drum or belt. It may also be called
carrier. In mono component systems the toner and developer are mixed together. A
dual component system keeps the toner and developer in separate areas.
Device driver In the context of computer networking a device driver is a software
module forming part of a computer operating system, or software that interacts with
the operating system. It aims to control communications equipment, such as a LAN
network adapter card and facilitate the transfer of information to and from the network.
Other examples of device driver programs include software to support the activities
of printers, disks and mice.
DHCP (Dynamic Host Configuration Protocol) A TCP/IP protocol that enables a
network connected to the Internet to assign a temporary IP address to a host
automatically when the host connects to the network.
Digital Copier A digital copier uses a scanner to scan and then reproduce hard
copy documents. In contrast, and analog photocopier uses lenses and reflected
light to copy a document.
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