Rice Lake MSI Crane Scales - Ethernet Option - Manual (Page 18)

14 Ethernet Option Operator’s Manual
12.0 Glossary
802.3
The IEEE standard for wired Ethernet.
802.11
The IEEE standard for wireless Local Area Networks.
DHCP
See Dynamic Host Configuration Protocol.
Dynamic Host Configuration Protocol (DHCP)
An Internet protocol for automating the configuration of computers that use TCP/IP. DHCP can be used to
automatically assign IP addresses, to deliver TCP/IP stack configuration parameters such as the subnet mask
and default router, and to provide other configuration information.
Hyper-Text Transfer Protocol (HTTP)
An application protocol in the TCP/IP suite that defines the rules for transferring files (text, graphic images,
sound, video, and other multimedia files) on the World Wide Web (WWW).
MAC address
A unique network identifier. All network devices are required to have their own unique MAC address. The
MAC address is on a sticker on the Digi device server. The number is displayed as 12 hexadecimal digits,
usually starting with 00:40:9D.
Multi-cast IP
A method of forwarding IP datagrams to a group of interested receivers.
TCP
See Transmission Control Protocol.
Transmission Control Protocol (TCP)
A set of rules (protocol) used along with the Internet Protocol (IP) to send data in the form of message units
between computers over the Internet. While IP handles the actual delivery of the data, TCP handles keeping
track of the individual units of data (called packets) that a message is divided into for efficient routing through
the Internet.
For example, when an HTML file is sent to from a Web server, the Transmission Control Protocol (TCP)
program layer in that server divides the file into one or more packets, numbers the packets, and then forwards
them individually to the IP program layer. Although each packet has the same destination IP address, it may
get routed differently through the network. At the other end (the client program in the computer), TCP
reassembles the individual packets and waits until they have arrived to forward them as a single file.
TCP is known as a connection-oriented protocol, which means that a connection is established and maintained
until such time as the message or messages to be exchanged by the application programs at each end have been
exchanged. TCP is responsible for ensuring that a message is divided into the packets that IP manages and for
reassembling the packets back into the complete message at the other end. In the Open Systems Interconnection
(OSI) communication model, TCP is in layer 4, the Transport Layer.