Quatech AirborneDirect WLNG-ET Series Especificações descarregar pdf (Página 51)

Glossary

100-8005-101G Airborne™ Product Family CLI Reference Guide Page 45

Quatech, Inc. Confidential

IEEE 802.1X

IEEE standard for port-based network control. 802.1X provides multiple

methods to authenticate devices attached to a LAN port and functions with

both wired and wireless LAN media. 802.1X is based on the Extensible

Authentication Protocol (EAP), and features dynamic distribution and

management of session keys. A RADIUS server is required for this security

standard.

IEEE 802.11i

IEEE security standard officially ratified in June 2004 as part of the 802.11

family. 802.11i was tested and certified for interoperability by the Wi-Fi

Alliance. In addition to improved encryption, this standard contains the

802.1X standard, improving key management and user authentication.

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.

MPDU

MAC Protocol Data Unit, the unit of data exchanged between two peer MAC

entities using the services of the physical layer (PHY).

MSDU

MAC Service Data Unit, information that is delivered as a unit between MAC

service Access Points (SAPs).

Peer-to-peer network

A wireless or wired computer network that has no server, central hub, or

router. All the networked PCs are equally able to act as a network server or

client, and each client computer can talk to all the other wireless computers

without having to go through an Access Point or hub. However, since there is

no central base station to monitor traffic or provide Internet access, the

various signals can collide with each other, reducing overall performance.

PSK

Pre-Shared Key and is used in authentication. This is a shared key between

the station and the AP and is entered as a passphrase.

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