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Frequently Asked Questions
Q What is 802.11b or Wi-Fi?
A The
IEEE 802.11 specification is a wireless LAN standard developed by the IEEE
committee in order to specify an "over the air" interface between a wireless
client and a base station or Access Point, as well as among wireless
clients. The IEEE created the specification but they do not certify
equipment, WECA certifies wireless LAN products.
Q What is
the difference between and access point and a wireless router?
A
Wireless Access Points add wireless to an existing network. An access point
will not share your internet connection, you will still need a router for
that. Wireless routers will share your internet connection for you as well
as add wireless to your network. We recommend a router over an access point
if you do not have a router already installed. It will save you time and
money installing only a wireless router as well as take up less space in
your home or office.
Q Where
can I get software/firmware updates for my wireless products?
A Click
on the Links below which correspond to the manufacturer of your wireless
products
Cisco Wireless Products
Proxim/ORiNOCO Wireless Products
Linksys Wireless Products
SMC Wireless Products
Q What is
the connector on the ORiNOCO PC Card used for?
A This
connector is for connecting an external antenna. By connecting an external
antenna, the PC Card on board antenna are disabled. Lucent provides an
optional indoor range extender antenna that can be connected to the PC Card
using this connector. This range extender gives an EXTRA coverage
improvement of 50%. When used on the AP-1000 side, this antenna will create
50% larger cells.
Q Does the
ORiNOCO Wireless PC Card work with other manufacturers PCI/ISA Adapters?
A
Sometimes. We recommend only using the Lucent PCI/ISA Adapters because
operation with other manufacturer's adapters can cause problems.
Q How many
computers can I connect wirelessly to the wireless routers?
A You can
connect up to 253 clients (assuming that there are NO users plugged into
ports 1-3)
Q What is
Infrastructure Mode?
A A
wireless network that consists of at least one Access Point connected to the
wired network infrastructure and a set of wireless end stations
Q What is
Ad-Hoc Mode?
A Set of
802.11b wireless stations that communicate directly with one another without
using an access point or any connection to a wired network.
Q What is
the maximum distance from a wireless router or access point?
A In
ideal situations, 1500 feet is about the maximum distance you can reach with
just a wireless access point or wireless router. Generally though it depends
on your situation. Metal and Concrete can cause degradation in the signal,
as well as microwave ovens and 2.4 GHz phones. If setup properly, a wireless
access point or router will give you up to 150 feet indoors and up to 1000
feet outdoors.
Q What is
WEP?
A WEP
stands for "Wired Equivalent Privacy". It is based on the IEEE 802.11
standard and uses the RC4 encryption algorithm. Enabling WEP allows you to
increase security by encrypting data being transferred over your wireless
network.
When WEP encryption is enabled, there are two options: 64-bit and 128-bit.
64-bit is the same as 40-bit WEP. The lower level of WEP encryption uses a
40-bit (10 character) "secret key" (set by the user), and a 24-bit
"initialization vector" (not under user control). So lower level 40 and 64
bit WEP cards are equivalent in encryption strength and compatibility.
Q What is
War Driving or Stumbling?
A War
Driving, also called Stumbling, is the act of driving around searching for
wireless networks. War Driving is done by people for research purposes like
plotting an area of wireless networks, or informing a company of a security
risk in their wireless network, as well as by hackers who want to take
advantage of those security risks. War Driving has taken it's name from the
popular movie "War Games" in which hackers would do something called War
Dialing. Read more about it at
WarDriving.com and
Netstumbler.com.
Q What are
DSSS and FHSS?
A
Frequency-hopping spread-spectrum (FHSS) uses a narrowband carrier that
changes frequency in a pattern that is known to both transmitter and
receiver. Properly synchronized, the net effect is to maintain a single
logical channel. To an unintended receiver, FHSS appears to be
short-duration impulse noise. Direct-sequence spread-spectrum (DSSS)
generates a redundant bit pattern for each bit to be transmitted. This bit
pattern is called a chip (or chipping code). The longer the chip, the
greater the probability that the original data can be recovered. Even if one
or more bits in the chip are damaged during transmission, statistical
techniques embedded in the radio can recover the original data without the
need for retransmission. To an unintended receiver, DSSS appears as low
power wideband noise and is rejected (ignored) by most narrowband receivers.
Most wireless LAN vendors have been adopting DSSS technology after
considering the trade off between cost and performance.
Would the information be intercepted while transmitting on air? WLAN
features two-fold protection in security. On the hardware side, to an
unintended receiver, DSSS appears as low power wideband noise and is
rejected (ignored) by most narrowband receivers. On the software side, WLAN
series offer the encryption function (WEP) to enhance security and Access
Control. Users can set it up depending on their needs.
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