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DHCP client
Each device with network capability that supports communication with a DHCP server to
obtain dynamically leased IP configurations and other optional parameter information.
DHCP server
A computer on which the Microsoft DHCP service runs. This provides active DHCP clients
with dynamic configuration of IP addresses and related information.
DHCP: Dynamic Host Configuration Protocol
A TCP/IP service protocol that allows dynamic configurations of host IP addresses for a
certain time and distributes related configuration parameters to authorized network clients.
DHCP provides safe and simple-to-use configuration of TCP/IP networks, prevents address
conflicts and helps to restrict the number of IP addresses required in the network. DHCP
uses a client/server model in which the DHCP server takes over central management of IP
addresses used in the network. Clients with DHCP support can then request and obtain the
lease of an IP address from a DHCP server when the network starts up.
DI/DO
Digital Input /Digital Output
DIN
Deutsches Institut für Normung - German institute for standardization
Distortion: Distortion
Image error that becomes evident in the image of a rectangular grid where the straight lines
are bent inwards or outwards.
DNS server Domain Name System server
A hierarchically distributed database containing assignments of DNS domain names to
various data types, such as IP addresses. DNS allows computers and services to be found
based on user-friendly names and also allows other information stored in the database to be
found.
Download
In communications, to transfer a data copies from a remote computer to the requesting
computer, for example, to send the operating system from a PC to a controller.
DP
Distributed Peripheral I/O
Vision Sensor SIMATIC VS120
Operating Instructions, Edition 02/2006, A5E00757507-01
Glossary
Glossary-3
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