Quatech 802.11B/G Especificaciones descargar pdf (Pagina 62)

Glossary

Page 56 Airborne Wireless LAN Node Module Data Book 100-8004-102G

Quatech, Inc. Confidential

Command Line

Interface (CLI)

A method of interacting with the Airborne WLN Module by sending it typed

commands.

DHCP

Short for Dynamic Host Configuration Protocol, DHCP is a protocol for

assigning dynamic IP addresses to devices on a network. With dynamic

addressing, a device can have a different IP address every time it connects to

the network. DHCP also supports a mix of static and dynamic IP addresses.

Direct Sequence

Spread Spectrum

(DSSS)

Combines a data signal at the sending station with a higher data rate bit

sequence, which many refer to as a “chip sequence” (also known as

“processing gain”). A high processing gain increases the signal’s resistance

to interference. The minimum processing gain that the FCC allows is 10. Most

products operate under 20.

Disassociation

service

An IEEE 802.11 term that defines the process a station or Access Point uses

to notify that it is terminating an existing association.

Distribution service

An IEEE 802.11 station uses the distribution service to send MAC frames

across a distribution system.

GPIO

General Purpose Input/Output refers to the digital I/O lines.

Host application

The environment within which the Module is embedded. It typically includes a

processor, which forms part of an OEM’s product and application.

Hot spot

Same as an Access Point, usually found in public areas such as coffee shops

and airports.

IEEE

Institute of Electrical and Electronic Engineers, an international organization

that develops standards for electrical technologies. The organization uses a

series of numbers, like the Dewey Decimal system in libraries, to differentiate

between the various technology families.

Independent Basic

Service Set Network

(IBSS Network)

An IEEE 802.11-based wireless network that has no backbone infrastructure

and consists of at least two wireless stations. This type of network is often

referred to as an Ad Hoc network because it can be constructed quickly

without too much planning.

Infrastructure mode

A client setting providing connectivity to an Access Point. As compared to Ad

Hoc mode, where PCs communicate directly with each other, clients set in

Infrastructure mode all pass data through a central Access Point. The Access

Point not only mediates wireless network traffic in the immediate

neighborhood, but also provides communication with the wired network.

See Ad Hoc and Access Point.

LAN application

A software application that runs on a computer that is attached to a LAN,

Intranet, or the Internet, and uses various protocols to communicate with the

Module.

LEAP

Lightweight Extensible Authentication Protocol developed by Cisco. LEAP

provides username/password-based authentication between a wireless client

and a RADIUS server. It is one of several protocols used with the IEEE

802.1X standard for LAN port access control.

Local Area Network

A system of connecting PCs and other devices within the same physical

proximity for sharing resources such as Internet connections, printers, files,

and drives. When Wi-Fi is used to connect the devices, the system is known

as a wireless LAN or WLAN.

Media Access

Control (MAC) Layer

One of two sub-layers that make up the Data Link Layer of the OSI reference

model. The MAC layer is responsible for moving data packets to and from

one network node to another across a shared channel.

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