Glossary Of Terms - Nomadix HotSpot Gateway HSG User Manual

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OT POT ATEWAY

Glossary of Terms

802.11x
Refers to a family of specifications developed by the
an over-the-air interface between a wireless client and a base station, or between two wireless clients. The
IEEE accepted the specification in 1997. There are several specifications in the 802.11 family:
802.11
Applies to wireless LANs and provides 1 or 2 Mbps transmission in the 2.4 GHz band using either
Frequency Hopping Spread Spectrum (FHSS) or Direct Sequence Spread Spectrum (DSSS).
802.11a
An extension to 802.11 that applies to wireless LANs and provides up to 54 Mbps in the 5GHz band.
802.11a uses an Orthogonal Frequency Division Multiplexing (OFDM) encoding scheme rather than
FHSS or DSSS.
802.11b
(also referred to as 802.11 High Rate or Wi-Fi™) An extension to 802.11 that applies to wireless
LANs and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1 Mbps) in the 2.4 GHz band.
802.11b uses only DSSS. 802.11b was a 1999 ratification to the original 802.11 standard, allowing
wireless functionality comparable to Ethernet.
802.11g
Applies to wireless LANs and provides 20+ Mbps in the 2.4 GHz band.
802.1Q
An IEEE standard for providing a virtual LAN capability within a campus network. 802.1Q establishes a
standard format for frame tagging (Layer 2 VLAN markings), enabling the creation of VLANs that use
equipment from multiple vendors.
10/100 Ethernet
See Ethernet.
AAA
(Authentication, Authorization, and Accounting) A combination of commands used by Nomadix Gateways
to authenticate, authorize, and subsequently bill subscribers for their use of the customer's network. When
a subscriber logs into the system, their unique MAC address is placed into an authorization table. The
system then authenticates the subscriber's MAC address and billing information before allowing them to
access the Internet and make online purchases. See also,
Access Concentrator
A type of multiplexor that combines multiple channels onto a single transmission medium in such a way
that all the individual channels can be simultaneously active. For example, ISPs use concentrators to
combine their dial-up modem connections onto faster T-1 lines that connect to the Internet. Concentrators
are also used in Local Area Networks (LANs) to combine transmissions from a cluster of nodes. In this
case, the concentrator is often called a hub.
Access Router
A router at a customer site, which connects to the network service provider. Also known as a Customer
Premises Equipment (CPE) router. See also, Router.
Glossary of Terms
IEEE for wireless LAN technology. 802.11 specifies
MAC Address.
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