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You hear the
jargon all the time: Hot spots, 802.11, Bluetooth, WLAN,
WEP.
But the relentless collection of numbers and
acronyms can be confusing
With the
help of our tech support team, we've created a glossary
of wireless terms. Use this resource to educate
yourself, your business associates and your customers. A
little knowledge about current -- and future --
solutions can open doors to the growing number of
wireless sales opportunities.
802.11
| One of the hottest wireless technologies around,
802.11 powers today's WLANs in offices, homes and public
hot spots. The moniker 802.11 refers to a family of
specifications developed by the Institute for Electronic
and Electrical Engineers (IEEE) for WLAN technology.
802.11 refers to an over-the-air interface between a
wireless client and a base station or between wireless
clients. All standards ratified by the IEEE, whether
they be for speed or security, fall under the 802.11
banner.
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Worried
about wireless security? Knowing the
basics can keep connections safe.
read
more |
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802.11a | This standard
operates on the 5-GHz band at speeds of up to 54 Mbps.
The standard has been eclipsed in popularity by the
802.11 b/g standard with its cheaper costs and wider
range. But because the protocol operates on a different
band than b/g, users are less likely to encounter
interference from other radio frequency devices, such as
cordless phones. Walls, however, can obstruct the signal
fairly easily, so access points should be installed
every 50 feet. Another benefit of 802.11a: It gives
system administrators more control by letting them
assign user groups to 13 channels, as opposed to four
for 802.11b/g.
802.11b/g
| These two versions of the technology operate on the
2.4 -MHz frequency (the same as cordless phones and
microwaves). The b standard lets users access the
internet at up to 11 Mbps (compared to typical DSL or
cable access of 1 Mbps). The g standard dramatically
increases speeds to a maximum of 54 Mbps. And g is
backward-compatible with the b standard. The signal of b
and g can travel up to 300 feet, but walls tend to
reduce the range. Access points should be installed
every 200 feet.
802.11n | Currently in development, this standard
will eventually supersede the a and b/g standards,
boasting speeds of anywhere from 100 Mbps to more than
500 Mbps. The standard has yet to be ratified. Corporate
electronics manufacturers and industry advocates are
still hashing out such details as backward
compatibility. (Compatibility with current 802.11
equipment would ensure that current investments in
wireless infrastructure weren't in vain, but it could
water down connection speeds.)
Bluetooth | While 802.11 drives wireless LANs (WLANS),
Bluetooth complements that technology by powering
devices that talk to each other, such as a laptops, cell
phones and PDAs. A Bluetooth-enabled headphone, for
example, lets cell phone users talk hands-free without
wires. Bluetooth products, which also include printers
and optical mice, must pass interoperability testing by
the Bluetooth Special Interest Group prior to release.
Members include Sony-Ericsson, IBM, Intel, Nokia and
Toshiba.
Hot spot | Public places,
including coffee houses, convention centers and
airports, that offer wireless web access. A laptop or
PDA equipped with a WLAN can instantly access the
service for free or a small charge.
Router | A key wireless
infrastructure device. Wireless routers typically
connect two networks, such as a LAN and ISP, and forward
data packets along that network.
Tri-band products | WLAN cards and routers that
allow laptops and PDAs equipped with any combination of
802.11 a/b/g technology to access the web using
whichever standard is available. These products are
Wi-Fi compatible.
Wi-Fi
| Short for wireless fidelity, this term refers to any
802.11 technology sanctioned as interoperable by the
Wi-Fi Alliance industry group. Products approved by the
Alliance, including 802.11 a and b/g routers, access
points and WLAN cards, receive the official Wi-Fi seal.
WiMax
| A new technology that takes advantage of the emerging
802.16 standard for wireless metropolitan networks,
WiMax will route wireless signals to multiple users
within a 31-mile radius. The approach will help solve
the so-called "last mile" problem that corporate users
face when installing a T-3 line or other major web pipe
into an office building. Those installations often
require digging up nearby streets to link with available
fiber optics. 802.16, under the commercial name WiMax,
will let businesses tap the highest-speed access
wirelessly, without facing hefty construction costs.
Expect to see mass deployment of WiMax boxes by early
2006. Products from Intel and Proxim are slated to
appear beginning early next year.
Wireless Access Point | A key component of the
wireless infrastructure for 802.11 WLANs. These hardware
devices provide network security and extend the physical
range of wireless coverage.
You
can also find useful information at a number of web
sites that specialize in wireless technology. Start your
research at
Wi-Fi Planet, and
Wi-Fi
Alliance. |