3Com WX4400 3CRWX440095A - Manual (Page 691)

G LOSSARY 691
MSDU MAC service data unit. In IEEE 802.11 communications, the data
payload encapsulated within a MAC protocol data unit (MPDU).
MSS See Mobility System Software™ (MSS™).
MTU Maximum transmission unit. The size of the largest packet that can be
transmitted over a particular medium. Packets exceeding the MTU value
in size are fragmented or segmented, and then reassembled at the
receiving end. If fragmentation is not supported or possible, a packet
that exceeds the MTU value is dropped.
NAT Network address translation. The capability, defined in RFC 3022, of
using one set of reusable IP addresses for internal traffic on a LAN, and
a second set of globally unique IP addresses for external traffic.
network address
translation
See NAT.
network plan A design for network deployment and settings for network
configuration, stored in the 3Com Wireless Switch Manager (3WXM)
tool suite.
nonvolatile storage A way of storing images and configurations so that they are
maintained in a unit’s memory whether power to the unit is on or off.
Odyssey An 802.1X security and access control application for wireless LANs
(WLANs), developed by Funk Software, Inc.
OFDM Orthogonal frequency division multiplexing. A modulation technique
that sends data across a number of narrow subcarriers within a
specified frequency band. The wireless networking standards IEEE
802.11a and IEEE 802.11g are based on OFDM.
orthogonal
frequency division
multiplexing
See OFDM.
pairwise master key See PMK.
pairwise transient
key
See PTK.
PAT Port address translation. A type of network address translation (NAT) in
which each computer on a LAN is assigned the same IP address, but a
different port number. See also NAT.