ProSoft Technology RLX2-IHx Series User Manual page 243

RLX2-IHx Series ♦ 802.11a, b, g, n
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MAC ID
Media Access Control address. Every device has its own MAC address which is
a unique identifier used to unambiguously identify the source and destination of
any packet on the network.
Mbps
Megabits per second, or a million bits per second. A measure of data rate.
Megahertz
A measure of electromagnetic wave frequency equal to one million hertz. Often
abbreviated as MHz and used to specify the radio frequency used by wireless
devices.
MIC
Message Integrity Check. One of the elements added to the TKIP standard. A
signature is added by each radio on each packet it transmits. The signature is
based on the data in the packet, a 64-bit value (key) and the MAC address of the
sender. The MIC allows the receiving radio to verify (check) that the data is not
forged or altered.
MIMO
Multiple Input Multiple Output refers to using multiple antennas in a Wi-Fi device
to improve performance and throughput. MIMO technology takes advantage of a
characteristic called multipath, which occurs when a radio transmission starts out
at Point A and the reflects off or passes through surfaces or objects before
arriving, via multiple paths, at Point B. MIMO technology uses multiple antennas
to collect and organize signals arriving via these paths.
Modbus
The Modbus protocol provides the internal standard that the MODICON
controllers use for parsing messages. During communications on a Modbus
network, the protocol determines how each controller knows its device address,
recognizes a message addressed to it, determines the kind of action to be taken,
and extracts any data or other information contained in the message. If a reply is
required, the controller constructs the reply message and sends it using Modbus
protocol.
Modem
MOdulator-DEModulator, a device that converts digital signals to analog signals
and vice-versa. Analog signals can be transmitted over communications links
such as telephone lines.
N
Network
A series of stations or nodes connected by some type of communication medium.
A network may consist of a single link or multiple links.
Node
An address or software location on the network.
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Glossary of Terms
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