NETGEAR WAG302 manual Appendix B Wireless Networking Basics, Wireless Networking Overview

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Appendix B

Wireless Networking Basics

This chapter provides an overview of Wireless networking.

Wireless Networking Overview

The WAG302 Access Point conforms to the Institute of Electrical and Electronics Engineers (IEEE) 802.11a, 802.11b, and 802.11g standards for wireless LANs (WLANs).

•IEEE 802.11a uses Orthogonal Frequency Division Multiplexing (OFDM), a new encoding scheme that offers certain benefits over a spread spectrum in channel availability and data rate. On an 802.11a wireless link, data is transmitted in the unlicensed radio spectrum at 5GHz. The 802.11a uses OFDM to define a total of 8 non-overlapping 200 MHz channels across the 2 lower bands; each of these is divided into 52 sub carriers and each carrier is approximately 300 KHz wide. The 802.11a wireless link offers a maximum data rate of 54 Mbps, but will automatically back down to rates 48, 36, 24, 18, 12, 9, and 6 Mbps.

•On an 802.11b or g wireless link, data is encoded using direct-sequence spread-spectrum (DSSS) technology and is transmitted in the unlicensed radio spectrum at 2.5GHz. The maximum data rate for the 802.11b wireless link is 11 Mbps, but it will automatically back down from 11 Mbps to 5.5, 2, and 1 Mbps when the radio signal is weak or when interference is detected. The 802.11g auto rate sensing rates are 1, 2, 5.5, 6, 9, 12, 18, 24, 36, 48, and 54 Mbps.

The 802.11 standard is also called Wireless Ethernet or Wi-Fi by the Wireless Ethernet Compatibility Alliance (WECA, see http://www.wi-fi.net), an industry standard group promoting interoperability among 802.11 devices. The 802.11 standard offers two methods for configuring a wireless network - ad hoc and infrastructure.

Infrastructure Mode

With a wireless Access Point, you can operate the wireless LAN in the infrastructure mode. This mode provides wireless connectivity to multiple wireless network devices within a fixed range or area of coverage, interacting with wireless nodes via an antenna.

Wireless Networking Basics

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Contents NETGEAR, Inc Technical Support Tested to Comply with FCC Standards WAG302 ProSafe Dual Band Wireless Access PointDeclaration of Conformity Industry Canada Compliance Statement Product and Publication Details Contents Chapter Management Appendix a Specifications Appendix C Command Line Reference Bold Chapter About This ManualAudience, Scope, Conventions, and Formats How to Use This Manual Printing a Page in the Html View How to Print this ManualAbout This Manual Chapter Introduction About the WAG302 ProSafe Dual Band Wireless Access PointSupported Standards and Conventions Key FeaturesAutoCell-The Self-Organizing Wireless Network Autosensing Ethernet Connections with Auto Uplink 802.11a/g Standards-based Wireless NetworkingCompatible and Related Netgear Products What’s In the Box? System Requirements100 Hardware DescriptionFront Panel 802.11g Wlan Rear Panel802.11a Wlan Serial Console Port Observing Placement and Range Guidelines Chapter Basic Installation and ConfigurationCabling Requirements Time Zone Adjust for Daylight Saving TIme Disabled Default Factory SettingsEnabled but Trap forwarding is disabled Secure Telnet EnabledLUHOHVVDWD 6HFXULW\2SWLRQV Understanding WAG302 Wireless Security OptionsSET UP the WAG302 Access Point Installing the WAG302 Access PointLogin window Web browser will then display the WAG302 General information Basic Settings menu Basic Installation and Configuration Wireless Settings 11a menu Deploy the WAG302 Access Point How to Log In to the WAG302 Using Its Default IP Address Wireless Settings 11a Understanding Basic Wireless SettingsBasic Installation and Configuration Wireless Settings 11b/g Basic Installation and Configuration Basic Installation and Configuration Understanding WEP/WPA Security Options 10 WEP/WPA Settings menus for 11a and 11b/gBasic Installation and Configuration 802.11a Configuration Before You Change the Ssid and WEP Settings802.11b/g Configuration How to Set Up and Test Basic Wireless Connectivity Access Control 11a menu Access Control 11b/g menu How to Restrict Wireless Access by MAC AddressHow to Configure WEP Click Apply to save your settings How to Configure WPA with Radius 13 Radius Server Settings menu 14 WEP/WPA Settings menus for 11a and 11bg 15 WEP/WPA Settings menus for 11a and 11bg How to Configure WPA-PSKIP Address Using the Basic IP Settings OptionsSpanning Tree Protocol Basic Installation and Configuration Remote Management Chapter ManagementHow to Use the CLI via the Console Port Using the Secure Telnet InterfaceSecure Telnet Client CLI CommandsSyslog and Activity Log information Using Syslog and Activity Log InformationGeneral Information Viewing General and Statistical InformationCurrent Wireless Settings 11a Field Description Access Point InformationCurrent IP Settings Field Description Current Wireless Settings 11b/g Statistics Field Description Wired Ethernet Received/TransmittedWireless 11a Received/Transmitted Refresh button Field Description Wireless 11b/g Received/TransmittedViewing a List of Attached Devices Configuration File Management Upgrading the Wireless Access Point SoftwareRestoring the WAG302 to the Factory Default Settings Saving and Retrieving the ConfigurationRebooting the Access Point Using the Reset Button to Restore Factory Default SettingsSet Password menu Changing the Administrator PasswordManagement Understanding Advanced IP Settings for Wireless Clients Chapter Advanced ConfigurationAdvanced IP Settings for Wireless Clients screen Understanding Advanced Wireless Settings Enhance RF Privacy -- Default Disable Problem AutoCell SettingsAuto RF Management -- Default Enable AutoCell RF ManagementAuto RF Management Enhanced RF Security ‘Stealth Mode’ Additional AutoCell View Management Options Advanced Wireless Settings screen Configuring Wireless LAN ParametersEnabling Wireless Bridging and Repeating Point-to-Point Bridge How to Configure a WAG302 as a Point-to-Point BridgeManual Advanced Configuration Multi-Point bridging How to Configure Wireless RepeatingAdvanced Configuration No lights are lit on the access point Chapter TroubleshootingLAN light is not lit Wireless LAN activity light does not light upWhen I enter a URL or IP address I get a timeout error Cannot connect to the WAG302 to configure itUsing the Reset Button to Restore Factory Default Settings Parameter WAG302 ProSafe Dual Band Wireless Access Point Appendix a SpecificationsSpecifications for the WAG302 Specifications Infrastructure Mode Appendix B Wireless Networking BasicsWireless Networking Overview Network Name Extended Service Set Identification Essid Ad Hoc Mode Peer-to-Peer WorkgroupAuthentication Authentication and WEP Data Encryption802.11b Authentication Open System Steps 802.11b Authentication Shared Key Steps Key Size 802.11b/g Wireless Channels Wireless ChannelsWEP Configuration Options Channel Center Frequency Frequency Spread Table B-2 802.11b/g Radio Frequency ChannelsChannel Frequency 802.11a Wireless ChannelsWAG302 user can use five channels in turbo mode WPA Wireless SecurityHow Does WPA Compare to WEP? How Does WPA Compare to Ieee 802.11i? What are the Key Features of WPA Security?Wireless Networking Basics Radius Server Figure B-3 WPA OverviewAccess point replies with an EAP-request identity message WPA Data Encryption Key Management Temporal Key Integrity Protocol Tkip Product Support for WPA Is WPA Perfect?Changes to Wireless Access Points Changes to Wireless Client Programs Command Sets Appendix C Command Line ReferenceCommand Line Reference Command Line Reference Command Line Reference 802.1x 100BASE-Tx802.11a 802.11bCertificate Authority Auto UplinkCat Domain Name Dynamic Host Configuration ProtocolLocal area network Internet ProtocolMAC address MbpsNetmask NetBIOSNetwork Address Translation PacketWide area network Wi-Fi Windows Internet Naming ServiceWireless Network Name Ssid Glossary

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