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Configuring the WAP2000 Access Point
Using Windows Help Menus
Cisco WAP2000 Wireless-G Access Point with Power Over Ethernet Administration Guide
66
6
Using Windows Help Menus
This wireless product requires Microsoft Windows. Product features can be
accessed through Windows Help and are described in the following sections:
•
TCP/IP, page 66
•
Shared Resources, page 66
•
Network Neighborhood/My Network Places, page 66
TCP/IP
Before a computer can communicate with the Access Point, TCP/IP must be
enabled. TCP/IP is a set of instructions, or protocol, all computers follow to
communicate over a network. This is true for wireless networks as well. Your
computers will not be able to utilize wireless networking without having TCP/IP
enabled. Windows Help provides complete instructions on enabling TCP/IP.
Shared Resources
If you wish to share printers, folder, or files over your network, Windows Help
provides complete instructions about utilizing shared resources.
Network Neighborhood/My Network Places
Other computers on your network will appear under Network Neighborhood or
My Network Places, depending upon the version of Windows you're running.
Windows Help provides complete instructions about adding computers to your
network.
Page 72 / 86
A
Cisco WAP2000 Wireless-G Access Point with Power Over Ethernet Administration Guide
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Troubleshooting
This appendix provides solutions to problems that may occur during the
installation and operation of the WAP2000 Wireless-G Access Point with Power
Over Ethernet.
If you can’t find an answer here, check the Cisco website at
www.cisco.com
.
Can the WAP2000 Access Point act as my DHCP Server?
No. The WAP2000 Access Point is nothing more than a wireless hub, and as such
cannot be configured to handle DHCP capabilities.
Can I run an application from a remote computer over the wireless network?
This depends on whether the application is designed to be used over a network.
Consult the application’s documentation to determine if it supports operation over
a network.
Can I play multiplayer games with other users of the wireless network?
Yes, as long as the game supports multiple players over a local area network
(LAN). Refer to the game’s documentation for more information.
What is the IEEE 802.11b standard?
It is one of the IEEE standards for wireless networks. The 802.11b standard allows
wireless networking hardware from different manufacturers to communicate,
provided that the hardware complies with the 802.11b standard.
The 802.11b standard states a maximum data transfer rate of 11 Mbps and an
operating frequency of 2.4 GHz.
What is the IEEE 802.11g standard?
It is one of the IEEE standards for wireless networks. The 802.11g standard allows
wireless networking hardware from different manufacturers to communicate,
provided that the hardware complies with the 802.11g standard.
The 802.11g standard states a maximum data transfer rate of 54 Mbps and an
operating frequency of 2.4 GHz.
Page 73 / 86
Troubleshooting
Cisco WAP2000 Wireless-G Access Point with Power Over Ethernet Administration Guide
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What IEEE 802.11b features are supported?
The product supports the following IEEE 802.11 functions:
•
CSMA/CA
•
Acknowledge protocol
•
Multi-Channel Roaming
•
Automatic Rate Selection
•
RTS/CTS
•
Fragmentation
•
Power Management
What IEEE 802.11g features are supported?
The product supports the following IEEE 802.11g functions:
•
CSMA/CA
•
Acknowledge protocol
•
OFDM protocol
•
Multi-Channel Roaming
•
Automatic Rate Selection
•
RTS/CTS
•
Fragmentation
•
Power Management
What is Ad-hoc?
An Ad-hoc wireless LAN is a group of computers, each with a WLAN adapter,
connected as an independent wireless LAN. An Ad-hoc wireless LAN is
applicable at a departmental scale for a branch or SOHO operation.
What is Infrastructure?
An integrated wireless and wired LAN is called an Infrastructure configuration.
Infrastructure is applicable to enterprise scale for wireless access to a central
database, or wireless application for mobile workers.
Page 74 / 86
Troubleshooting
Cisco WAP2000 Wireless-G Access Point with Power Over Ethernet Administration Guide
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What is roaming?
Roaming is the ability of a portable computer user to communicate continuously
while moving freely throughout an area greater than that covered by a single
access point. Before using the roaming function, the workstation must make sure
that it is set to the same channel number as the access point of the dedicated
coverage area.
To achieve true seamless connectivity, the wireless LAN must incorporate a
number of different functions. Each node and access point, for example, must
always acknowledge receipt of each message. Each node must maintain contact
with the wireless network even when not actually transmitting data.
Achieving these functions simultaneously requires a dynamic RF networking
technology that links access points and nodes. In such a system, the user’s end
node undertakes a search for the best possible access to the system.
First, it evaluates such factors as signal strength and quality, as well as the
message load currently being carried by each access point and the distance of
each access point to the wired backbone. Based on that information, the node
next selects the right access point and registers its address. Communications
between end node and host computer can then be transmitted up and down the
backbone.
As the user moves on, the end node’s RF transmitter regularly checks the system
to determine whether it is in touch with the original access point or whether it
should seek a new one. When a node no longer receives acknowledgment from its
original access point, it undertakes a new search. Upon finding a new access
point, it then re-registers, and the communication process continues.
What is the ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth for
unlicensed use in the Industrial, Scientific, and Medical (ISM) band. Spectrum in
the vicinity of 2.4 GHz, in particular, is being made available worldwide. This
presents a truly revolutionary opportunity to place convenient high speed
wireless capabilities in the hands of users around the globe.
What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique
developed by the military for use in reliable, secure, mission-critical
communications systems. It is designed to trade off bandwidth efficiency for
reliability, integrity, and security.
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Troubleshooting
Cisco WAP2000 Wireless-G Access Point with Power Over Ethernet Administration Guide
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In other words, more bandwidth is consumed than in the case of narrowband
transmission, but the trade-off produces a signal that is, in effect, louder and thus
easier to detect, provided that the receiver knows the parameters of the spread-
spectrum signal being broadcast.
If a receiver is not tuned to the right frequency, a spread-spectrum signal looks like
background noise. There are two main alternatives, Direct Sequence Spread
Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).
What is DSSS? What is FHSS? And what are their differences?
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.
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.
Would the information be intercepted while transmitting on air?
WLAN features two-fold protection in security. On the hardware side, as with
DSSS technology, it has the inherent security feature of scrambling. On the
software side, the WLAN series offers a variety of wireless security methods to
enhance security and access control. Users can set it up depending upon their
needs.
Can Cisco wireless products support file and printer sharing?
Cisco wireless products perform the same function as LAN products. Therefore,
Cisco wireless products can work with NetWare, Windows NT/2000, or other LAN
operating systems to support printer or file sharing.
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40-bit
shared-key algorithm, as described in the IEEE 802.11 standard.

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