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ViewSonic Wireless Media Gateway 87
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.
HotSpot. A place where you can access Wi-Fi service. This can be
for free or for a fee. HotSpots can be inside a coffeeshop, 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 WiFi. Wired hubs can have numerous ports
and can transmit data at speeds ranging from 10 Mbps to
multigigabyte speeds per second. A hub transmits packets it
receives to all the connected ports. A small wired hub may only
connect four computers; a large hub can connect 48 or more.
Wireless hubs can connect hundreds.
HZ (Hertz). 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 electrical 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 LANs operate at 2.4 GHz.