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M
Media Access Control address. A unique 48-bit number used in Ethernet data
MAC
packets to identify an Ethernet device such as an access point or your client
adapter.
A cryptographic checksum, designed to make it computationally infeasible for
Message Integrity
Code (MIC)
an adversary to alter data. This is usually called a Message Authentication Code,
or MAC, in the literature, but the acronym MAC is already reserved for another
meaning in this standard.
Any of several techniques for combining user information with a transmitter's
modulation
carrier signal.
The echoes created as a radio signal bounces off of physical objects.
multipath
A single data message (packet) sent to multiple addresses.
multicast packet
O
This typically refers to a primarily circular antenna radiation pattern.
omni-directional
A modulation technique used by IEEE 802.11a-compliant wireless LANs for
Orthogonal
transmission at 6, 9, 12, 18, 24, 36, 48, and 54 Mbps.
Frequency Division
Multiplex (OFDM)
P
A basic message unit for communication across a network. A packet usually includes routing
packet
information, data, and sometimes error detection information.
Two entities that is associated with each other; an access point and one associated station, or a pair of
pairwise
stations in an IBSS network, used to describe the key hierarchies for keys that are shared only between
the two entities in a pairwise.
The key that is generated on a per-session basis and is used as one of the inputs into the PRF to derive
Pairwise Master Key
the Pairwise Transient Keys (PTK). For EAP-TLS authentication, the Pairwise Master Key is the key
(PMK)
from the RADIUS MS-MPPE-Recv-Key attribute. For Pre-Shared Key authentication, the Pairwise
Master Key is the Pre-Shared Key.
PMK identification
PMKID
A value that is derived from the PRF using the SNonce and ANonce, and is split up into as many as
Pairwise Transient
five keys (Temporal Encryption Key, two Temporal MIC Keys, EAPOL-Key Encryption Key,
Key (PTK)
EAPOL-Key MIC Key) for use by the rest of the system.
A key that is distributed to the units in the system by manual means. Legacy WEP systems without
Pre-Shared Key
authentication used Pre-Shared Keys as the WEP keys. The Robust Security Network (RSN)
(PSK)
specification allows a system to use a Pre-Shared Key if there is no other authentication method
available, but using a Pre-Shared Key is not as secure.
OL-6415-03
Cisco Wireless Router and HWIC Configuration Guide
Glossary
GL-5
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