Linksys WAP54G manual What is the ISM band?

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Wireless-G Access Point

What is the 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 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?

WLAN 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 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 Linksys wireless products support file and printer sharing?

Linksys wireless products perform the same function as LAN products. Therefore, Linksys 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.

Appendix A: Troubleshooting

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Frequently Asked Questions

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Contents 802 GHz .11g Wireless- G How to Use this User Guide Copyright and TrademarksTable of Contents Appendix a Troubleshooting Appendix B Wireless SecurityFrequently Asked Questions Front Panel Back Panel25 Congratulations Screen Site Survey Screen Introduction WelcomeWhat’s in this User Guide? Wireless-G Access Point Planning Your Wireless Network Network TopologyRoaming Network Layout Getting to Know the Wireless-G Access Point Cisco logoBack Panel LAN Port Connecting the Wireless-G Access Point Connections for SetupOverview Setting up the Wireless-G Access Point Using the Setup WizardConnect the Network Cable to the Router or Switch Screen Check the Access Point’s Status Screen Password Screen Basic Settings Screen Using the Access Point’s SecureEasySetup Feature 10 SecureEasySetup Screen15 Confirm New Settings Screen Configuring a Non-SecureEasySetup Device 16 Congratulations ScreenManually Configuring the Access Point’s Wireless Settings 17 Configure Wireless Settings ScreenWEP 64-Bit WEP 128-BitWPA Personal WPA2 PersonalWPA2 Mixed Mode Linksys Wireless GuardWPA Enterprise 25 Congratulations Screen Configuring the Linksys Wireless Guard Settings 26 Attention Screen28 Securing Your Access Point Screen 31 Wireless Guard Congratulations Screen Using the Linksys Wireless Guard Service Client Software InstallationExit Other Applications Destination Location Network Access Restart Your ComputerAccessing your Account Your Account11 Network Administration Add a Guest12 Modify Access Control Add a Member Member Registration16 Subscriber Information 18 Credentials Information Securing or Unprotecting Your Wireless Guard Network To unprotect a networkTo secure an unprotected network Configuring the Wireless-G Access Point SetupNavigating the Utility Wireless AdministrationStatus Network Setup Accessing the UtilitySetup Network Setup Tab Configuration TypeSetup Static IP Screen Setup AP Mode Tab AP ModeLAN MAC Address Configuring the Wireless-G Access Point Setup AP Mode Tab Wireless-G Access Point Wireless Basic Wireless Settings Tab Basic Wireless Settings12 Confirm Reset WPA-Personal Wireless Wireless Security TabWireless Security WPA2-PersonalWPA2-Mixed WPA-EnterpriseRadius Wireless Wireless MAC Filter Tab Wireless MAC FilterAccess Restriction Wireless Advanced Wireless Settings Tab Advanced WirelessWireless-G Access Point Backup and Restore Administration Management TabAP’s Password ManagementAdministration Snmp Tab Snmp V1/V2cSnmp Community Administration Log Tab LogFirmware Upgrade Administration Factory Defaults TabAdministration Firmware Upgrade Tab Factory DefaultsStatus Local Network Tab AP’s InformationLocal Network Status Wireless Network Tab Wireless NetworkAppendix a Troubleshooting Frequently Asked QuestionsWhat Ieee 802.11g features are supported? What is the ISM band? Does the Access Point function as a firewall? Appendix B Wireless Security Security PrecautionsSecurity Threats Facing Wireless Networks Security Threats Facing Wireless Networks Wireless-G Access Point Figure C-1 Firmware Upgrade Appendix C Upgrading FirmwareAppendix D Windows Help Shared ResourcesNetwork Neighborhood/My Network Places Appendix E Glossary Wireless-G Access Point Wireless-G Access Point Wireless-G Access Point Wireless-G Access Point Wireless-G Access Point Wireless-G Access Point Appendix F Specifications Operating Humidity Appendix G Warranty Information Limited WarrantyAppendix H Regulatory Information FCC StatementAppendix I Contact Information Need to contact Linksys?Information section in this Guide
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