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Glossary
GL-4
Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide
OL-4211-03
.
I
IEEE
Institute of Electrical and Electronics Engineers. A professional society serving electrical engineers
through its publications, conferences, and standards development activities. The body responsible for
the Ethernet 802.3 and wireless LAN 802.11 specifications.
infrastructure
The wired Ethernet network.
infrastructure
device
A device (such as an access point, bridge, or base station) that connects client adapters to a wired LAN.
IP address
The Internet Protocol address of a station.
IP subnet mask
The number used to identify the IP subnetwork, indicating whether the IP address can be recognized
on the LAN or if it must be reached through a gateway.
IPX
Internetwork Packet Exchange. The NetWare network layer protocol used for transferring data from
servers to workstations.
L
LEAP
LEAP, or EAP-Cisco Wireless, is an 802.1X authentication type. With LEAP, a username and password
are used by the client adapter to perform mutual authentication with the RADIUS server through an
access point.
M
MAC address
The Media Access Control (MAC) address is a unique serial number assigned to a networking device
by the manufacturer.
MIC
Message integrity check. MIC prevents bit-flip attacks on encrypted packets. During a bit-flip attack,
an intruder intercepts an encrypted message, alters it slightly, and retransmits it, and the receiver
accepts the retransmitted message as legitimate. The client adapter’s driver must support MIC
functionality, and MIC must be enabled on the access point.
modulation
Any of several techniques for combining user information with a transmitter’s carrier signal.
multicast packets
Packets transmitted to multiple stations.
multipath
The echoes created as a radio signal bounces off of physical objects.
O
OFDM
Orthogonal frequency division multiplexing. A multicarrier modulation method for broadband wireless
communications.
overrun packets
Packets that were discarded because the access point had a temporary overload of packets to handle.