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Highland Park Public Library. Introduction and application Of 802.11 wireless networks. What are we covering?. What is 802.11b? g? preN Setting up a home wireless network. Fun with Wireless. Questions & Answers. Nobrainer. Cheaper & Easier, no wiring Share Broadband - PowerPoint PPT Presentation
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Highland Park Public Library
Introduction and applicationOf 802.11 wireless networks
What are we covering?• What is 802.11b? g? preN• Setting up a home wireless
network.• Fun with Wireless.• Questions & Answers
Nobrainer• Cheaper & Easier, no wiring• Share Broadband • Share printers and other resources• ‘untethered’ Internet access• Work anywhere, collaborate
Get Rich Quick!
Get Rich Quick!Just checking if you’re paying attention!
802.11b
802.11b• DSSS- Direct Sequence Spread Spectrum
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels
Starts at 2412 MHz
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels
Starts at 2412 MHz spaced 5 MHz apart
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels
Starts at 2412 MHz spaced 5 MHz apart channel bandwidth is about 20 MHz
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels
Starts at 2412 MHz spaced 5 MHz apart channel bandwidth is about 20 MHz 3 effective non overlapping channels
(1,6,11)
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels
802.11b• DSSS- Direct Sequence Spread Spectrum• 11 channels• Support bandwidths of: 1, 2, 5.5, and 11
Mbps
802.11• DSSS- Direct Sequence Spread
Spectrum• 11 channels• Security
WEP (Wired Equivalent Privacy) authentication40/128 bit encryption
MAC(Media Access Control) access lists.
802.11b• Support bandwidths up to 11 Mbps
802.11g• Support bandwidths up to 54 Mbps
802.11preN• Support bandwidths up to 108 Mbps
Typical Home Networks
Typical Home Networks• Internet Access
Typical Home Networks• Internet Access
Modem Cable Modem DSL
Wireless• Best Value is to buy a Access point
switch combo
Wireless• Best Value is to buy a Access point
switch combo Several vendors
Dlink, Linksys, Belken, Motorola, etc
Wireless• Best Value is to buy a Access point
switch combo Several vendors
Dlink, Linksys, Xsense, Farallon, etc Typical Features
Web based admin Firewall DHCP Server (Auto Configueration) Switch for wired PCs
Wireless net
internet
COAX cable enters the cable modem, and Ethernet exits and connects to the access point, The access point acts as a single client on the cable network
Wireless net
internet
The access point is a router and serves as a firewall, DHCP Server and switch
Wireless net
internet
10.0.0.x
You can connect computers via Ethernet, they reside on a private segment
Wireless net
internet
10.0.1.x10.0.0.x
Wireless computers have their own IP network.
Wireless net
internet
10.0.1.x10.0.0.x
What are we covering?• What is 802.11b?• Setting up a home wireless
network.• Fun with 802.11b.• Questions & Answers
Wireless fun
Wireless fun
Wireless fun
Wireless fun
