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SI-PROFINET RT User Guide
Issue Number: 2
DHCP (Dynamic Host Configuration Protocol)
: This is a protocol used to allocate
dynamic IP addresses to network devices from a central server.
DNS (Domain Name Server)
: This is a server that is used to convert a URL such as
"www.controltechniques.com" to an IP address such as 129.254.254.106.
Double word
: A 32-bit word, this may be signed or unsigned.
Duplex
: A communication facility providing transmission in either one direction only
(half-duplex) or two directions simultaneously (full-duplex).
Grounding
: Describes the electrical safety or shielding connections for the module.
GSDML (General Station Description Markup Language) file
: An XML based file that
defines the properties of a network device and contains information describing the
features available on the device.
Ethernet address
: See MAC address.
Explicit data
: See Non-cyclic data.
Firewall
: A computer or piece of software that restricts connections between different
ports. This can be useful when restricting data flow between two network segments.
Frame
: The entire sequence of bits and bytes in a transmitted block.
FTP (File Transfer Protocol)
: A protocol using the TCP/IP protocols commonly used
for transferring files over the Internet.
Full-duplex
: See Duplex
Gateway
: A device that allows devices on different subnets or networks to
communicate with each other.
Half-duplex
: See Duplex
Hub
: A method of connecting computers together on Ethernet. An un-switched hub will
repeat any data received on one port to all ports.
HTTP (Hypertext transfer protocol)
: This is a document specification protocol
commonly used in web pages.
Implicit data
: See Cyclic data.
IEEE (Institute of Electrical and Electronic Engineers)
: An international institute that
issues its own standards and is a member of ANSI and ISO.
IP
: Internet Protocol, this is the protocol used to transmit bytes across an IP network.
IP address
: An address that identifies a node uniquely on a subnet or network.