5/26/05 Glossary
OL-7426-03
GARP
General Attribute Registration Protocol.
Gateway
In the wireless world, a gateway is an access point with additional software capabilities such as
providing NAT and DHCP. Gateways may also provide VPN support, roaming, firewalls, various levels of
security, etc.
GigE
A Gigabit Ethernet IEEE standard (802.3) for operating 1000 Mbps Ethernet networks (LANs) with fiber
optic cables and wiring hubs. See also 1000BASE-SX.
GUI
Graphical User Interface. A computer user interface based on graphics rather than text; uses a mouse
or other input device as well as a keyboard.
GVRP
GARP VLAN Registration Protocol.
HotSpot
A place where you can access Wi-Fi service. This can be for free or for a fee. HotSpots can be inside a
coffee shop, airport lounge, train station, convention center, hotel or any other public meeting area.
Corporations and campuses are also implementing HotSpots to provide wireless Internet access to their
visitors and guests. In some parts of the world, HotSpots are known as CoolSpots.
Hub
A multiport device used to connect PCs to a network via Ethernet cabling or via wireless connections.
Wired hubs can have numerous ports and can transmit data at speeds ranging from 10 Mbps to multig-
igabyte speeds per second. A hub transmits packets it receives to all the connected ports. A small wired
hub may only connect 4 computers; a large hub can connect 48 or more. Wireless hubs can connect
hundreds.
Hz
The international unit for measuring frequency, equivalent to the older unit of cycles per second. One
megahertz (MHz) is one million hertz. One gigahertz (GHz) is one billion hertz. The standard US elec-
trical power frequency is 60 Hz, the AM broadcast radio frequency band is 535-1605 kHz, the FM
broadcast radio frequency band is 88-108 MHz, and wireless 802.11b/g LANs operate at 2.4 GHz.
I/O
The term used to describe any operation, program or device that transfers data to or from a computer.
ID Certificate
A Certificate used by Web server operators to ensure secure server operation. Usually accompanied by
a Private Key.
IEEE
Institute of Electrical and Electronics Engineers, New York, www.ieee.org. A membership organization
that includes engineers, scientists and students in electronics and allied fields. It has more than
300,000 members and is involved with setting standards for computers and communications.