LINKSYS WUSBF54G Wireless-G USB Adapter with Wi-Fi Finder User Manual Book

LINKSYS LLC Wireless-G USB Adapter with Wi-Fi Finder Book

Contents

Users Manual 2

32
Chapter 5: Using the Wireless Network Monitor
Creating a New Profile
Wireless-G USB Network Adapter with Wi-Fi Finder
WPA Enterprise
WPA Enterprise features WPA security used in coordination with a RADIUS server. (This should only be used
when a RADIUS server is connected to the Router.) WPA Enterprise offers two authentication methods, EAP-
TLS and PEAP, as well as two encryption methods, TKIP and AES, with dynamic encryption keys.
Authentication - Select the authentication method your network is using, EAP-TLS or PEAP.
EAP-TLS
If you selected EAP-TLS, enter the login name of your wireless network in the Login Name field. Enter the
name of the authentication server in the Server Name field (this is optional). From the Certificate drop-down
menu, select the certificate you have installed to authenticate you on your wireless network. Select the type
of encryption, TKIP or AES, from the Encryption drop-down menu.
Click the Next button to continue or the Back button to return to the previous screen.
PEAP
If you selected PEAP, enter the login name of your wireless network in the Login Name field. Enter the
password of your wireless network in the Password field. Enter the name of the authentication server in the
Server Name field (this is optional). From the Certificate drop-down menu, select the certificate you have
installed to authenticate you on your wireless network; if you want to use any certificate, keep the default
setting, Trust Any. Then select the authentication method (Inner Authen.) used inside the PEAP tunnel. Select
EAP-MSCHAP v2. Then, select the type of encryption, TKIP or AES, from the Encryption drop-down menu.
Click the Next button to continue or the Back button to return to the previous screen.
Figure 5-24: Wireless Security - WPA Enterprise - EAP-TLS
Figure 5-25: Wireless Security - WPA Enterprise - PEAP
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Chapter 5: Using the Wireless Network Monitor
Creating a New Profile
Wireless-G USB Network Adapter with Wi-Fi Finder
RADIUS
RADIUS uses the security of a RADIUS server. (This should only be used when a RADIUS server is connected to
the Router.) It offers two authentication methods: EAP-TLS and PEAP.
Authentication - Select the authentication method your network is using, EAP-TLS or PEAP.
EAP-TLS
Enter the Login name of your wireless network in the Login Name field. From the Certificate drop-down menu,
select the certificate you have installed to authenticate you on your wireless network.
PEAP
If you selected PEAP, enter the login name of your wireless network in the Login Name field. Enter the
password of your wireless network in the Password field. Enter the name of the authentication server in the
Server Name field (this is optional). From the Certificate drop-down menu, select the certificate you have
installed to authenticate you on your wireless network; if you want to use any certificate, keep the default
setting, Trust Any. Then select the authentication method (Inner Authen.) used inside the PEAP tunnel. Select
EAP-MSCHAP v2.
Click the Next button to continue to the Confirm New Settings screen or the Back button to return to the
previous screen.
Figure 5-26: Wireless Security - RADIUS - EAP-TLS
Figure 5-27: Wireless Security - RADIUS - PEAP
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Chapter 5: Using the Wireless Network Monitor
Creating a New Profile
Wireless-G USB Network Adapter with Wi-Fi Finder
5. The next screen displays all of the Adapter’s settings. If these are correct, you can save these settings to your
hard drive by clicking Save. Click Next to continue. If these settings are not correct, click Back to change
your settings.
6. After the software has been successfully installed, the Congratulations screen will appear. Click Connect to
Network to connect to your network. Clicking Return to Profile will open the Wireless Network Monitor’s
Profiles screen.
Congratulations! The profile has been configured.
Figure 5-28: Confirm New Settings
Figure 5-29: The Congratulations Screen
35
Appendix A: Troubleshooting
Common Problems and Solutions
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix A: Troubleshooting
This appendix provides solutions to problems usually encountered during the installation and operation of the
Adapter. Read the description below to solve your problems. If you can't find an answer here, check the Linksys
website at www.linksys.com.
Common Problems and Solutions
1.My computer does not recognize the USB Network Adapter.
• Make sure that the USB Network Adapter is properly inserted into the USB port.
• Also, make sure that the USB Controller is enabled in the BIOS. Check with your motherboard User Guide for
more information.
2. The USB Network Adapter does not work properly.
• Reinsert the USB Network Adapter into the notebook or desktop’s USB port.
• Right-click on My Computer, and select Properties. Select the Adapter, then chose the Device Manager tab,
and click on the Network Adapter. You will find the USB Network Adapter if it is installed successfully. If you
see a yellow exclamation mark, the resources may be conflicting and you must follow the steps below:
• Uninstall the driver software from your PC.
• Restart your PC and repeat the hardware and software installation as specified in this User Guide.
3. I cannot communicate with the other computers linked via Ethernet in the Infrastructure
configuration.
• Make sure that the notebook or desktop is powered on.
• Make sure that your USB Network Adapter is configured on the same channel, SSID, and WEP as the other
computers in the Infrastructure configuration.
36
Appendix A: Troubleshooting
Frequently Asked Questions
Wireless-G USB Network Adapter with Wi-Fi Finder
Frequently Asked Questions
Can I run an application from a remote computer over the wireless network?
This will depend on whether or not the application is designed to be used over a network. Consult the
application’s user guide to determine if it supports operation over a network.
Can I play computer games with other members of the wireless network?
Yes, as long as the game supports multiple players over a LAN (local area network). Refer to the game’s user
guide 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 11Mbps and an operating frequency of 2.4GHz.
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 54Mbps and an operating frequency of 2.4GHz.
What IEEE 802.11b features are supported?
The product supports the following IEEE 802.11b functions:
• CSMA/CA plus Acknowledge protocol
• Multi-Channel Roaming
• Automatic Rate Selection
• RTS/CTS feature
• Fragmentation
• Power Management
What IEEE 802.11g features are supported?
The product supports the following IEEE 802.11g functions:
• CSMA/CA plus Acknowledge protocol
• OFDM protocol
• Multi-Channel Roaming
• Automatic Rate Selection
• RTS/CTS feature
• Fragmentation
• Power Management
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Appendix A: Troubleshooting
Frequently Asked Questions
Wireless-G USB Network Adapter with Wi-Fi Finder
What is ad-hoc mode?
When a wireless network is set to ad-hoc mode, the wireless-equipped computers are configured to
communicate directly with each other. The ad-hoc wireless network will not communicate with any wired
network.
What is infrastructure mode?
When a wireless network is set to infrastructure mode, the wireless network is configured to communicate with a
wired network through a wireless access point.
What is roaming?
Roaming is the ability of a PC 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 the same channel number with the access point of 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 ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM
(Industrial, Scientific and Medical) 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. 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
38
Appendix A: Troubleshooting
Frequently Asked Questions
Wireless-G USB Network Adapter with Wi-Fi Finder
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?
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.
Would the information be intercepted while transmitting on air?
The Adapter features two-fold protection in security. On the hardware side, as with Direct Sequence Spread
Spectrum technology, it has the inherent security feature of scrambling. On the software side, the Adapter offers
the encryption function (WEP) to enhance security and access control.
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as
described in the IEEE 802.11 standard.
39
Appendix B:
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix B: Using Windows XP Wireless Configuration
If your computer is running Windows XP, then this choice will be available. If you want to use Windows XP
Wireless Configuration to control the Adapter, instead of using the Wireless Network Monitor, then right-click on
the Wireless Network Monitor and select Use Windows XP Wireless Configuration.
If you want to switch back to the Wireless Network Monitor, right-click the Wireless Network Monitor icon, and
select Use Linksys Wireless Network Monitor.
1. After installing the Adapter, the Windows XP Wireless Configuration icon will appear in your computer’s
system tray. Double-click the icon.
Figure B-1: Wireless Network Monitor Icon
Figure B-2: Windows XP - Use Windows XP
Wireless Configuration
NOTE: For more information about Windows XP Wireless Configuration, refer to Windows Help.
Figure B-3: Windows XP Wireless Configuration Icon
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Appendix B:
Wireless-G USB Network Adapter with Wi-Fi Finder
2. The screen that appears will show any available wireless network. Select the network you want. Click the
Connect button.
If your network does not have wireless security enabled, go to step 3.
If your network does have wireless security enabled, go to step 4.
3. If your network does not have wireless security enabled, click the Connect Anyway button to connect the
Adapter to your network.
NOTE: Steps 2 and 3 are the instructions and
screenshots for Windows XP with Service Pack 2
installed.
Figure B-4: Available Wireless Network
Figure B-5: No Wireless Security
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Appendix B:
Wireless-G USB Network Adapter with Wi-Fi Finder
4. If your network uses wireless security WEP, enter the WEP Key used into the Network Key and Confirm
network key fields. If your network uses wireless security WPA Personal, enter the Passphrase used into
the Network Key and Confirm network key fields. Click the Connect button.
5. Your wireless network will appear as Connected when your connection is active.
For more information about wireless networking on a Windows XP computer, click the Start button, select Help,
and choose Support. Enter the keyword wireless in the field provided, and press the Enter key.
The installation of the Windows XP Wireless Configuration is complete.
NOTE: Windows XP Wireless Configuration does not
support the use of a passphrase. Enter the exact WEP
key used by your wireless router or access point.
Figure B-6: Network Connection - Wireless Security
Figure B-7: Wireless Network Connection
42
Appendix C: Wireless Security
Security Precautions
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix C: Wireless Security
Linksys wants to make wireless networking as safe and easy for you as possible. The current generation of
Linksys products provide several network security features, but they require specific action on your part for
implementation. So, keep the following in mind whenever you are setting up or using your wireless network.
Security Precautions
The following is a complete list of security precautions to take (at least steps 1 through 5 should be followed):
1. Change the default SSID.
2. Disable SSID Broadcast.
3. Change the default password for the Administrator account.
4. Enable MAC Address Filtering.
5. Change the SSID periodically.
6. Use the highest encryption algorithm possible. Use WPA if it is available. Please note that this may reduce
your network performance.
7. Change the WEP encryption keys periodically.
Security Threats Facing Wireless Networks
Wireless networks are easy to find. Hackers know that in order to join a wireless network, wireless networking
products first listen for “beacon messages”. These messages can be easily decrypted and contain much of the
network’s information, such as the network’s SSID (Service Set Identifier). Here are the steps you can take:
Change the administrator’s password regularly. With every wireless networking device you use, keep in mind
that network settings (SSID, WEP keys, etc.) are stored in its firmware. Your network administrator is the only
person who can change network settings. If a hacker gets a hold of the administrator’s password, he, too, can
change those settings. So, make it harder for a hacker to get that information. Change the administrator’s
password regularly.
SSID. There are several things to keep in mind about the SSID:
Note: Some of these security features are
available only through the network router or
access point. Refer to the router or access
point’s documentation for more information.
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Appendix C: Wireless Security
Security Threats Facing Wireless Networks
Wireless-G USB Network Adapter with Wi-Fi Finder
1. Disable Broadcast
2. Make it unique
3. Change it often
Most wireless networking devices will give you the option of broadcasting the SSID. While this option may be
more convenient, it allows anyone to log into your wireless network. This includes hackers. So, don’t broadcast
the SSID.
Wireless networking products come with a default SSID set by the factory. (The Linksys default SSID is “linksys”.)
Hackers know these defaults and can check these against your network. Change your SSID to something unique
and not something related to your company or the networking products you use.
Change your SSID regularly so that any hackers who have gained access to your wireless network will have to
start from the beginning in trying to break in.
MAC Addresses. Enable MAC Address filtering. MAC Address filtering will allow you to provide access to only
those wireless nodes with certain MAC Addresses. This makes it harder for a hacker to access your network with
a random MAC Address.
WEP Encryption. Wired Equivalent Privacy (WEP) is often looked upon as a cure-all for wireless security
concerns. This is overstating WEP’s ability. Again, this can only provide enough security to make a hacker’s job
more difficult.
There are several ways that WEP can be maximized:
1. Use the highest level of encryption possible
2. Use “Shared Key” authentication
3. Change your WEP key regularly
WPA. Wi-Fi Protected Access (WPA) is the newest and best available standard in Wi-Fi security. Two modes are
available: WPA-Personal and WPA-Enterprise. WPA-Personal gives you a choice of two encryption methods: TKIP
(Temporal Key Integrity Protocol), which utilizes a stronger encryption method and incorporates Message
Integrity Code (MIC) to provide protection against hackers, and AES (Advanced Encryption Standard), which
utilizes a symmetric 128-Bit block data encryption. WPA-Enterprise offers two encryption methods, TKIP and AES,
with dynamic encryption keys, and it uses a RADIUS (Remote Authentication Dial-In User Service) server for
authentication.
Important: Always remember that each
device in your wireless network MUST use
the same encryption method and encryption
key or your wireless network will not function
properly.
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Appendix C: Wireless Security
Security Threats Facing Wireless Networks
Wireless-G USB Network Adapter with Wi-Fi Finder
WPA-Personal. If you do not have a RADIUS server, select the type of algorithm you want to use, TKIP or AES,
and enter a password in the Passphrase field of 8-63 characters.
WPA-Enterprise. WPA used in coordination with a RADIUS server. (This should only be used when a RADIUS
server is connected to the Router or other device.) WPA-Enterprise offers two encryption methods, TKIP and
AES, with dynamic encryption keys.
Implementing encryption may have a negative impact on your network’s performance, but if you are transmitting
sensitive data over your network, encryption should be used.
These security recommendations should help keep your mind at ease while you are enjoying the most flexible
and convenient technology Linksys has to offer.
45
Appendix D: Windows Help
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix D: Windows Help
All wireless products require Microsoft Windows. Windows is the most used operating system in the world and
comes with many features that help make networking easier. These features can be accessed through Windows
Help and are described in this appendix.
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 PCs follow to communicate over a network. This is true for wireless networks as well.
Your PCs 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 on
utilizing shared resources.
Network Neighborhood/My Network Places
Other PCs 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 on adding PCs to your
network.
46
Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix E: Glossary
802.11a - A wireless networking standard that specifies a maximum data transfer rate of 54Mbps and an
operating frequency of 5GHz.
802.11b - A wireless networking standard that specifies a maximum data transfer rate of 11Mbps and an
operating frequency of 2.4GHz.
802.11g - A wireless networking standard that specifies a maximum data transfer rate of 54Mbps, an operating
frequency of 2.4GHz, and backward compatibility with 802.11b devices.
Access Point - A device that allows wireless-equipped computers and other devices to communicate with a
wired network. Also used to expand the range of a wireless network.
Adapter - A device that adds network functionality to your PC.
Ad-hoc - A group of wireless devices communicating directly with each other (peer-to-peer) without the use of
an access point.
AES (Advanced Encryption Standard) - A security method that uses symmetric 128-bit block data encryption.
Backbone - The part of a network that connects most of the systems and networks together, and handles the
most data.
Bandwidth - The transmission capacity of a given device or network.
Beacon Interval - Data transmitted on your wireless network that keeps the network synchronized.
Bit - A binary digit.
Boot - To start a device and cause it to start executing instructions.
Bridge - A device that connects different networks.
Broadband - An always-on, fast Internet connection.
Browser - An application program that provides a way to look at and interact with all the information on the
World Wide Web.
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Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
Buffer - A shared or assigned memory area that is used to support and coordinate different computing and
networking activities so one isn't held up by the other.
Byte - A unit of data that is usually eight bits long
Cable Modem - A device that connects a computer to the cable television network, which in turn connects to the
Internet.
CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) - A method of data transfer that is used to prevent
data collisions.
CTS (Clear To Send) - A signal sent by a wireless device, signifying that it is ready to receive data.
Daisy Chain - A method used to connect devices in a series, one after the other.
Database - A collection of data that is organized so that its contents can easily be accessed, managed, and
updated.
DDNS (Dynamic Domain Name System) - Allows the hosting of a website, FTP server, or e-mail server with a
fixed domain name (e.g., www.xyz.com) and a dynamic IP address.
Default Gateway - A device that forwards Internet traffic from your local area network.
DHCP (Dynamic Host Configuration Protocol) - A networking protocol that allows administrators to assign
temporary IP addresses to network computers by "leasing" an IP address to a user for a limited amount of time,
instead of assigning permanent IP addresses.
DMZ (Demilitarized Zone) - Removes the Router's firewall protection from one PC, allowing it to be "seen" from
the Internet.
DNS (Domain Name Server) - The IP address of your ISP's server, which translates the names of websites into IP
addresses.
Domain - A specific name for a network of computers.
Download - To receive a file transmitted over a network.
DSL (Digital Subscriber Line) - An always-on broadband connection over traditional phone lines.
DSSS (Direct-Sequence Spread-Spectrum) - Frequency transmission with a redundant bit pattern resulting in a
lower probability of information being lost in transit.
48
Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
DTIM (Delivery Traffic Indication Message) - A message included in data packets that can increase wireless
efficiency.
Dynamic IP Address - A temporary IP address assigned by a DHCP server.
EAP (Extensible Authentication Protocol) - A general authentication protocol used to control network access.
Many specific authentication methods work within this framework.
EAP-PEAP (Extensible Authentication Protocol-Protected Extensible Authentication Protocol) - A mutual
authentication method that uses a combination of digital certificates and another system, such as passwords.
EAP-TLS (Extensible Authentication Protocol-Transport Layer Security) - A mutual authentication method that
uses digital certificates.
Encryption - Encoding data transmitted in a network.
Ethernet - A networking protocol that specifies how data is placed on and retrieved from a common transmission
medium.
Finger - A program that tells you the name associated with an e-mail address.
Firewall - A set of related programs located at a network gateway server that protects the resources of a
network from users from other networks.
Firmware - The programming code that runs a networking device.
Fragmentation -Breaking a packet into smaller units when transmitting over a network medium that cannot
support the original size of the packet.
FTP (File Transfer Protocol) - A protocol used to transfer files over a TCP/IP network.
Full Duplex - The ability of a networking device to receive and transmit data simultaneously.
Gateway - A device that interconnects networks with different, incompatible communications protocols.
Half Duplex - Data transmission that can occur in two directions over a single line, but only one direction at a
time.
Hardware - The physical aspect of computers, telecommunications, and other information technology devices.
HTTP (HyperText Transport Protocol) - The communications protocol used to connect to servers on the World
Wide Web.
49
Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
Infrastructure - A wireless network that is bridged to a wired network via an access point.
IP (Internet Protocol) - A protocol used to send data over a network.
IP Address - The address used to identify a computer or device on a network.
IPCONFIG - A Windows 2000 and XP utility that displays the IP address for a particular networking device.
IPSec (Internet Protocol Security) - A VPN protocol used to implement secure exchange of packets at the IP layer.
ISM band - Radio bandwidth utilized in wireless transmissions.
ISP (Internet Service Provider) - A company that provides access to the Internet.
LAN - The computers and networking products that make up your local network.
LEAP (Lightweight Extensible Authentication Protocol) - A mutual authentication method that uses a username
and password system.
MAC (Media Access Control) Address - The unique address that a manufacturer assigns to each networking
device.
Mbps (MegaBits Per Second) - One million bits per second; a unit of measurement for data transmission.
mIRC - An Internet Relay Chat program that runs under Windows.
Multicasting - Sending data to a group of destinations at once.
NAT (Network Address Translation) - NAT technology translates IP addresses of a local area network to a different
IP address for the Internet.
NAT (Network Address Translation) Traversal -A method of enabling specialized applications, such as Internet
phone calls, video, and audio, to travel between your local network and the Internet. STUN is a specific type of
NAT traversal.
Network - A series of computers or devices connected for the purpose of data sharing, storage, and/or
transmission between users.
NNTP (Network News Transfer Protocol) - The protocol used to connect to Usenet groups on the Internet.
Node - A network junction or connection point, typically a computer or work station.
50
Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
OFDM (Orthogonal Frequency Division Multiplexing) - Frequency transmission that separates the data stream
into a number of lower-speed data streams, which are then transmitted in parallel to prevent information from
being lost in transit.
Packet - A unit of data sent over a network.
Passphrase - Used much like a password, a passphrase simplifies the WEP encryption process by automatically
generating the WEP encryption keys for Linksys products.
PEAP (Protected Extensible Authentication Protocol) - A mutual authentication method that uses a combination
of digital certificates and another system, such as passwords.
Ping (Packet INternet Groper) - An Internet utility used to determine whether a particular IP address is online.
POP3 (Post Office Protocol 3) - A standard mail server commonly used on the Internet.
Port - The connection point on a computer or networking device used for plugging in cables or adapters.
Power over Ethernet (PoE) - A technology enabling an Ethernet network cable to deliver both data and power.
PPPoE (Point to Point Protocol over Ethernet) - A type of broadband connection that provides authentication
(username and password) in addition to data transport.
PPTP (Point-to-Point Tunneling Protocol) - A VPN protocol that allows the Point to Point Protocol (PPP) to be
tunneled through an IP network. This protocol is also used as a type of broadband connection in Europe.
Preamble - Part of the wireless signal that synchronizes network traffic.
QoS (Quality of Service) - QoS ensures better service to high-priority types of network traffic, which may involve
demanding, real-time applications, such as videoconferencing.
RADIUS (Remote Authentication Dial-In User Service) - A protocol that uses an authentication server to control
network access.
RJ-45 (Registered Jack-45) - An Ethernet connector that holds up to eight wires.
Roaming - The ability to take a wireless device from one access point's range to another without losing the
connection.
Router - A networking device that connects multiple networks together.
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Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
RTP (Real-time Transport Protocol) - A protocol that enables specialized applications, such as Internet phone
calls, video, and audio, to occur in real time.
RTS (Request To Send) - A networking method of coordinating large packets through the RTS Threshold setting.
Server - Any computer whose function in a network is to provide user access to files, printing, communications,
and other services.
SMTP (Simple Mail Transfer Protocol) - The standard e-mail protocol on the Internet.
SNMP (Simple Network Management Protocol) - A widely used network monitoring and control protocol.
Software - Instructions for the computer. A series of instructions that performs a particular task is called a
"program".
SOHO (Small Office/Home Office) - Market segment of professionals who work at home or in small offices.
SPI (Stateful Packet Inspection) Firewall - A technology that inspects incoming packets of information before
allowing them to enter the network.
Spread Spectrum - Wideband radio frequency technique used for more reliable and secure data transmission.
SSID (Service Set IDentifier) - Your wireless network's name.
Static IP Address - A fixed address assigned to a computer or device that is connected to a network.
Static Routing - Forwarding data in a network via a fixed path.
STUN (Simple Traversal of UDP through NATs) - A protocol that enables specialized applications, such as Internet
phone calls, video, and audio, to travel between your local network and the Internet. STUN is a specific type of
NAT traversal.
Subnet Mask - An address code that determines the size of the network.
Switch - 1. A data switch that connects computing devices to host computers, allowing a large number of
devices to share a limited number of ports. 2. A device for making, breaking, or changing the connections in an
electrical circuit.
TCP (Transmission Control Protocol) - A network protocol for transmitting data that requires acknowledgement
from the recipient of data sent.
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Appendix E: Glossary
Wireless-G USB Network Adapter with Wi-Fi Finder
TCP/IP (Transmission Control Protocol/Internet Protocol) - A set of instructions PCs use to communicate over a
network.
Telnet - A user command and TCP/IP protocol used for accessing remote PCs.
TFTP (Trivial File Transfer Protocol) - A version of the TCP/IP FTP protocol that has no directory or password
capability.
Throughput - The amount of data moved successfully from one node to another in a given time period.
TKIP (Temporal Key Integrity Protocol) - a wireless encryption protocol that provides dynamic encryption keys for
each packet transmitted.
Topology - The physical layout of a network.
TX Rate - Transmission Rate.
UDP (User Datagram Protocol) - A network protocol for transmitting data that does not require acknowledgement
from the recipient of the data that is sent.
Upgrade - To replace existing software or firmware with a newer version.
Upload - To transmit a file over a network.
URL (Uniform Resource Locator) - The address of a file located on the Internet.
VPN (Virtual Private Network) - A security measure to protect data as it leaves one network and goes to another
over the Internet.
WAN (Wide Area Network)- The Internet.
WEP (Wired Equivalent Privacy) - A method of encrypting network data transmitted on a wireless network for
greater security.
WINIPCFG - A Windows 98 and Me utility that displays the IP address for a particular networking device.
WLAN (Wireless Local Area Network) - A group of computers and associated devices that communicate with
each other wirelessly.
WPA (Wi-Fi Protected Access) - a wireless security protocol using TKIP (Temporal Key Integrity Protocol)
encryption, which can be used in conjunction with a RADIUS server.
53
Appendix F: Specifications
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix F: Specifications
Model WUSBF54G
Standards IEEE 802.11b, 802.11g, USB 1.1, USB 2.0
Channels 11 Channels (US, Canada)
13 Channels (Europe)
14 Channels (Japan)
LEDs Power, Link
Transmitted Power 18dBm (Typical)@11Mbps
16dBm (Typical)@54Mbps
Receive Sensitivity -73dBm (Typical)@54Mbps, -84dBm (Typical)@11Mbps
Security features WEP Encryption, WPA
Dimensions 3.78" x 0.63" x 1.14" (96 mm x 16 mm x 29 mm)
Unit Weight 0.05 lb (0.023 kg)
Certifications FCC, WiFi
Operating Temp. 0°C ~ 40°C (32°F ~ 104°F)
Storage Temp. -20°C ~ 70°C (-4°F ~ 158°F)
Operating Humidity 0% ~ 70% Non-Condensing
Storage Humidity 10% ~ 90% Non-Condensing
Maximum Average SAR (1g) is 0.910W/kg.
54
Appendix G: Warranty Information
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix G: Warranty Information
LIMITED WARRANTY
Linksys warrants to the original end user purchaser ("You") that, for a period of three years, (the "Warranty
Period") Your Linksys product will be free of defects in materials and workmanship under normal use. Your
exclusive remedy and Linksys's entire liability under this warranty will be for Linksys at its option to repair or
replace the product or refund Your purchase price less any rebates.
If the product proves defective during the Warranty Period call Linksys Technical Support in order to obtain a
Return Authorization Number. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. When
returning a product, mark the Return Authorization Number clearly on the outside of the package and include a
copy of your original proof of purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF
PURCHASE. You are responsible for shipping defective products to Linksys. Linksys pays for UPS Ground
shipping from Linksys back to You only. Customers located outside of the United States of America and Canada
are responsible for all shipping and handling charges.
ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
ARE LIMITED TO THE DURATION OF THE WARRANTY PERIOD. ALL OTHER EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF NON-INFRINGEMENT, ARE
DISCLAIMED. Some jurisdictions do not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to You. This warranty gives You specific legal rights, and You may also have other rights
which vary by jurisdiction.
TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT WILL LINKSYS BE LIABLE FOR ANY LOST DATA, REVENUE
OR PROFIT, OR FOR SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED
REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF OR RELATED TO THE USE OF OR INABILITY TO USE
THE PRODUCT, EVEN IF LINKSYS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT WILL
LINKSYS' LIABILITY EXCEED THE AMOUNT PAID BY YOU FOR THE PRODUCT.
The foregoing limitations will apply even if any warranty or remedy provided under this Section fails of its
essential purpose. Some jurisdictions do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to You.
Please direct all inquiries to: Linksys, P.O. Box 18558, Irvine, CA 92623 USA.
55
Appendix H: Regulatory Information
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix H: Regulatory Information
FCC STATEMENT
This product has been tested and complies with the specifications for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
according to the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which is found by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment or devices
Connect the equipment to an outlet other than the receiver's
Consult a dealer or an experienced radio/TV technician for assistance
FCC Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This device complies
INDUSTRY CANADA (CANADA)
Operation is subject to the following two conditions:
1) This device may not cause interference and
2) This device must accept any interference, including interference that may cause undesired operation of the device.
EC DECLARATION OF CONFORMITY (EUROPE)
Linksys declares that this product conforms to the specifications listed below, following the provisions of the European
R&TTE directive 1999/5/EC:
EN 301 489-1, 301 489-17 General EMC requirements for Radio equipment.
with FCC RF Exposure limits set forth for an uncontrolled environment, under 47 CFR 2.1093 paragraph (d)(2). This transmitter
must not be co-located or operating in conjunction with any other antenna or transmitter.
This equipment has been SAR-evaluated for use in laptops (notebooks) with side slot configuration. Linksys declares that
WUSBF54G ( FCC ID: Q87-WUSBF54G ) is limited in CH1~CH11 for 2.4 GHz by specified firmware controlled in U.S.A.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operations.
56
Appendix H: Regulatory Information
Wireless-G USB Network Adapter with Wi-Fi Finder
EN 609 50 Safety
EN 300-328-1, EN 300-328-2 Technical requirements for Radio equipment.
Caution: This equipment is intended to be used in all EU and EFTA countries. Outdoor use may be restricted to certain
frequencies and/or may require a license for operation. Contact local Authority for procedure to follow.
Note: Combinations of power levels and antennas resulting in a radiated power level of above 100 mW equivalent isotropic
radiated power (EIRP) are considered as not compliant with the above mentioned directive and are not allowed for use
within the European community and countries that have adopted the European R&TTE directive 1999/5/EC.
For more details on legal combinations of power levels and antennas, contact Linksys Corporate Compliance.
Linksys vakuuttaa täten että dieses produkt tyyppinen laite on direktiivin 1999/5/EY oleellisten vaatimusten ja sitä
koskevien näiden direktiivien muiden ehtojen mukainen.
Linksys Group déclare que le produit est conforme aux conditions essentielles et aux dispositions relatives à la directive
1999/5/EC.
Belgique:
Dans le cas d'une utilisation privée, à l'extérieur d'un bâtiment, au-dessus d'un espace public, aucun enregistrement n'est
nécessaire pour une distance de moins de 300m. Pour une distance supérieure à 300m un enregistrement auprès de l'IBPT
est requise. Pour une utilisation publique à l'extérieur de bâtiments, une licence de l'IBPT est requise. Pour les
enregistrements et licences, veuillez contacter l'IBPT.
France:
2.4 GHz Bande : les canaux 10, 11, 12, 13 (2457, 2462, 2467, et 2472 MHz respectivement) sont complétement libres
d'utilisation en France (en utilisation intérieur). Pour ce qui est des autres canaux, ils peuvent être soumis à autorisation
selon le départment. L'utilisation en extérieur est soumis à autorisation préalable et très restreint.
Vous pouvez contacter l'Autorité de Régulation des Télécommunications (http://www.art-telecom.fr) pour de plus amples
renseignements.
SAFETY NOTICES
Caution: To reduce the risk of fire, use only No.26 AWG or larger telecommunication line cord.
Do not use this product near water, for example, in a wet basement or near a swimming pool.
Avoid using this product during an electrical storm. There may be a remote risk of electric shock from lightning.
57
Appendix I: Contact Information
Wireless-G USB Network Adapter with Wi-Fi Finder
Appendix I: Contact Information
Need to contact Linksys?
Visit us online for information on the latest products and updates
to your existing products at: http://www.linksys.com or
ftp.linksys.com
Can't find information about a product you want to buy
on the web? Do you want to know more about networking
with Linksys products? Give our advice line a call at: 800-546-5797 (LINKSYS)
Or fax your request in to: 949-823-3002
If you experience problems with any Linksys product,
you can call us at: 800-326-7114
Don't wish to call? You can e-mail us at: support@linksys.com
If any Linksys product proves defective during its warranty period,
you can call the Linksys Return Merchandise Authorization
department for obtaining a Return Authorization Number at: 949-823-3000
(Details on Warranty and RMA issues can be found in the Warranty
Information section in this Guide.)

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