List of Examples

Chapter 1: Wi-Fi-What, Why, Where, Who, and How?

Figure 1.1: The Linksys WPS-11: Wireless Print Server. (Photo courtesy of Linksys.)

Figure 1.2: The D-Link DCS-100W Wireless Network Camera. (Photo courtesy of D-Link.)

Figure 1.3: The 2.4: GHz Wi-Fi Channels, National Allocations, and Overlap.

Chapter 2: Networking, Ethernet-Style

Figure 2.1: A Packet on the Ethernet.

Figure 2.2: A Category 5: End Connector.

Figure 2.3: A Star Topology Ethernet Network.

Figure 2.4: A Network Switch.

Figure 2.5: A 5-Port Switch for Home Networks. (Photo courtesy of Linksys.)

Figure 2.6: A MAC Address Label.

Figure 2.7: A Hub as Part of a Switched Network.

Figure 2.8: A Network with a Wireless Access Point.

Figure 2.9: An Ad-Hoc Wi-Fi Network.

Chapter 3: Your Net and the Internet

Figure 3.1: Interstate Highways for Data.

Figure 3.2: Your Computer on the ISP Network.

Figure 3.3: The Two Parts of an IP Address.

Figure 3.4: IP Address Classes.

Figure 3.5: The Windows 9x winipcfg Display.

Figure 3.6: How NAT Works.

Figure 3.7: The Linksys BEFSR41: Router and 4-Port Switch. (Photo courtesy of Linksys.)

Figure 3.8: Zone Alarm's Pop-up Permission Dialog.

Chapter 4: Designing Your Wi-Fi Network

Figure 4.1: The '85% Design' for Very Simple Networks.

Figure 4.2: 802.11a vs. 802.11b Bit Rate over Distance.

Figure 4.3: A Basic Service Set (BSS).

Figure 4.4: An Extended Service Set.

Figure 4.5: Avoiding Channel Conflicts in an ESS.

Chapter 5: Wi-Fi Communities

Figure 5.1: The LANster User Interface.

Figure 5.2: The Brisbane Mesh Topology.

Chapter 6: Access Points and Gateways

Figure 6.1: The Linksys WAP-11: Access Point. (Photo courtesy of Linksys.)

Figure 6.2: Access Point Functional Blocks.

Figure 6.3: A D-Link DWL-900AP+ Configuration Screen.

Figure 6.4: The Linksys BEFW11S4: Wireless Residential Gateway. (Photo courtesy of Linksys.)

Figure 6.5: A Wireless Residential Gateway.

Figure 6.6: The Orinoco Firmware Update Utility.

Figure 6.7: How Power over Ethernet (PoE) Works.

Figure 6.8: The D-Link DWL-P100: Power over Ethernet System.

Chapter 7: Client Adapters

Figure 7.1: The D-Link DWL-650: PCMCIA Card Client Adapter. (Photo courtesy of D-Link.)

Figure 7.2: The Asanté AeroLAN 1511: Client Adapter. (Photo courtesy of Asanté.)

Figure 7.3: The Linksys WMP-11: PCI Client Adapter. (Photo courtesy of Linksys.)

Figure 7.4: The Linksys WDT-11: PCI PC Card Adapter. (Photo courtesy of Linksys.)

Figure 7.5: The Linksys WUSB11: USB Client Adapter.

Figure 7.6: The Linksys WET11: Ethernet Client Adapter. (Photo courtesy of Linksys.)

Chapter 8: Antennas, Cables, and Connectors

Figure 8.1: The Shape of Antenna Fields.

Figure 8.2: A Commercial Radiation Pattern Chart. (Chart courtesy of Pacific Wireless, Inc.)

Figure 8.3: A Blade Antenna from Maxrad. (Photo courtesy of Maxrad.)

Figure 8.4: A Blade Antenna on a Home-Made Desk Stand. (Photo courtesy of Maxrad.)

Figure 8.5: A Ceiling Blister Antenna. (Photo courtesy of Pacific Wireless, Inc.)

Figure 8.6: The Super Cantenna Waveguide Antenna. (Photo courtesy of Cantenna.)

Figure 8.7: A 24: dBi Parabolic Grid Antenna. (Photo courtesy of Pacific Wireless, Inc.)

Figure 8.8: A Picture Frame Antenna's Radiation Pattern.

Figure 8.9: The Pacific Wireless PAWIN24-10: Antenna. (Photo courtesy of Pacific Wireless, Inc.)

Figure 8.10: A Backfire Antenna. (Photo courtesy of Pacific Wireless, Inc.)

Figure 8.11: Normal and Reverse Polarity Connectors.

Figure 8.12: A Male N Connector on a Coaxial Pigtail.

Figure 8.13: An MMCX Connector.

Figure 8.14: An RP-SMA connector.

Figure 8.15: An RP-TNC Connector on a Pigtail.

Chapter 9: Putting It Together and Testing It Out

Figure 9.1: Stacked Network Appliances. (Photo courtesy of Linksys.)

Figure 9.2: A Labeled Wall Wart.

Figure 9.3: Cabling for the 85% Network.

Figure 9.4: The BEFW11S4: Password Dialog.

Figure 9.5: The Main Setup Screen for the BEFW11S4.

Figure 9.6: The Windows XP Site Survey and Connect Window.

Figure 9.7: The Advanced Wireless Hardware Configuration Window.

Figure 9.8: The D-Link DWL-650+ Site Survey Window.

Figure 9.9: The D-Link Client Configuration Window.

Figure 9.10: The D-Link Link Info Window.

Figure 9.11: An Add-On Wi-Fi Network.

Figure 9.12: Using the Router Uplink Port to Add a Switch.

Figure 9.13: A Simple Multi-Zone Wi-Fi Network.

Figure 9.14: Using a HomePlug Powerline Link.

Figure 9.15: Specifying an Access Point for Client Connection.

Figure 9.16: Choosing Clients for a MAC Address Filter.

Figure 9.17: The QCheck Utility.

Figure 9.18: Testing Throughput.

Chapter 10: Wi-Fi Warriors on the Road

Figure 10.1: The Boingo Off-Line Hotspot Directory Search Screen.

Chapter 11: The Problem of the Speckled Axe

Figure 11.1: C-Clamps and Micrometers.

Chapter 14: Setting Up Security

Figure 14.1: The D-Link DWL-900AP+ Mac Filter Screen.

Figure 14.2: The Linksys BEFW11S4: configuration screen.

Figure 14.3: The WEP Key Settings Screen.

Figure 14.4: The Orinoco Client Manager.

Figure 14.5: Selecting a Profile to Edit.

Figure 14.6: The Set Security Screen.

Figure 14.7: The Windows XP Network Connection Applet.

Figure 14.8: The Windows XP Site Survey Window.

Figure 14.9: The Association Configuration Window.

Figure 14.10: Entry of WEP Keys.

Chapter 15: The Tin Can Bandwidth Expander Project

Figure 15.1: The Duntemann Tin Can Bandwidth Expander, Mark I.

Figure 15.2: The Duntemann Tin Can Bandwidth Expander, Mark III.

Figure 15.3: The UG-58: Chassis Mount N Connector.

Figure 15.4: The Simplest Tin Can Antenna.

Figure 15.5: Probe Measurement Cautions.

Figure 15.6: Drilling the Can.

Figure 15.7: An N female bulkhead connector.

Figure 15.8: The finished probe.

Figure 15.9: The finished tin can antenna.

Figure 15.10: The Tin Can Expander, Mark III in use.

Figure 15.11: The Duntemann, Mark I with optional Stove-Pipe Reducer Horn: Not Recommended.

Figure 15.12: A Tetra Brik Antenna.

Chapter 16: Bridging Two Networks

Figure 16.1: A Wireless Bridge Linking Two Networks.

Figure 16.2: A Short Tower for Rooftop Antenna Mounts.

Figure 16.3: An Outdoor Lashup for Bridge Testing.

Figure 16.4: A Surplus 30: Caliber Ammo Can.

Figure 16.5: A Female Bulkhead N Connector.

Figure 16.6: The Duntemann Ammo-Can Enclosure MARK I, Cover Removed.

Figure 16.7: Ammo Can Enclosure Interior Closeup.

Figure 16.8: The Enclosed Access Point in Place for Testing.

Chapter 17: The Parabolic Mesh Reflector Project

Figure 17.1: The Effect of a Microwave Shadow.

Figure 17.2: A Parabolic Mesh Reflector.

Figure 17.3: Aiming the Beam into the House.

Figure 17.4: The Parabolic Curve Template.

Figure 17.5: How Parabolic Reflectors Work.

Figure 17.6: The Reflector on the Curve Template.

Figure 17.7: Tying Down the Mesh Reflector with Wire.

Figure 17.8: The Complete Reflector Assembly and Access Point.

Figure 17.9: Machine Screws in the AP Bolt Slots.

Chapter 18: Going Wardriving

Figure 18.1: The Basic Wardriving Setup.

Figure 18.2: The Warchalking Quick Reference Card.

Figure 18.3: NetStumbler's Main Display.

Figure 18.4: NetStumbler's Signal Strength and Noise Display.

Figure 18.5: The NetStumbler GPS Configuration Tab.

Figure 18.6: The Holux GM-210: GPS Receiver. (Photo courtesy of Holux.)

Figure 18.7: The FAB 5 dbi Magnetic-Mount Omnidirectional Antenna.

Chapter 19: NetStumbler's Log Files

Figure 19.1: NetStumbler's Flag Bits.

Figure 19.2: The Channel Bits for Channels 1, 6, 8, and 11.

Figure 19.3: A Stumbverter Map with Stations.

Appendix C: Finding Your TCP/IP Configuration Data

Figure C.1: Dynamic (Left) And Static TCP/IP Properties.

Figure C.2: Windows 98's TCP/IP Configuration Tabs.