User`s manual

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DWS-1008 User’s Manual
D-Link Systems, Inc.
Appendix D - Glossary
minimum data transmit rate
The lowest rate at which a DWL-8220AP access point can transmit data to its associated
mobile clients. If the data rate to a client drops below the minimum, the AP increases power,
if RF AutoTuning is enabled.
Mobility System Software™ (MSS™)
The Trapeze operating system, accessible through a command-line interface (CLI), that
enables D-Link Mobility System products to operate as a single system. Mobility System
Software (MSS) performs authentication, authorization, and accounting (AAA) functions;
manages DWS-1008 switches and DWL-8220AP access points; and maintains the wireless
LAN (WLAN) by means of such network structures as MobileLAN groups, virtual LANs
(VLANs), tunnels, spanning trees, and link aggregation.
MPDU
MAC protocol data unit. In IEEE 802.11 communications, the data unit (or frame) that two peer
media access control (MAC) service access points (SAPs) exchange through the services of
the Physical layer (PHY). An MPDU consists of MAC headers and a MAC service data unit
(MSDU). See also MSDU.
MS-CHAP-V2
Microsoft Challenge Handshake Authentication Protocol version 2. Microsoft’s extension to
CHAP. MS-CHAP-V2 is a mutual authentication protocol, dened in RFC 2759, that also
permits a single login in a Microsoft network environment. See also CHAP.
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, dened in RFC 3022, of using one set of reusable
IP addresses for internal trafc on a LAN, and a second set of globally unique IP addresses
for external trafc.