Rice Lake MSI-9850 CellScale RF Digital Indicator - Ethernet Option Supplement - Manual (Page 18)

MEASUREMENT SYSTEMS INTERNATIONAL
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 your Digi device server. The number is displayed
as 12 hexadecimal digits, usually starting with 00:40:9D.
Multicast 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 you 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 your computer), TCP reassembles the individual packets and
waits until they have arrived to forward them to you 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
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