cwna guide to wireless lans, second edition1 a day in the life of a wireless user: hotspots:...
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CWNA Guide to Wireless LANs, Second Edition 1
A Day in the Life of a Wireless User:
• Hotspots:
• Wireless local area network (WLAN
• Bluetooth wireless standard
• Fixed broadband wireless
• Free space optics (FSO)
• Handheld devices
• Radio frequency identification (RFID) tags
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CWNA Guide to Wireless LANs, Second Edition 2
Wireless Local Area Networks (continued)
Figure 1-3: Wireless LAN
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CWNA Guide to Wireless LANs, Second Edition 3
Wireless Local Area Networks
Figure 1-4: Home wireless LAN
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CWNA Guide to Wireless LANs, Second Edition 4
Bluetooth (continued)
Figure 1-5: Bluetooth device
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CWNA Guide to Wireless LANs, Second Edition 5
Telecommunications Links
• Integrated Services Digital Networks (ISDN):
• T-1 lines
• Cable modems
• Digital subscriber lines (DSL
• WiMax
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CWNA Guide to Wireless LANs, Second Edition 6
Telecommunications Links
Figure 1-6: Free space optics transceiver
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CWNA Guide to Wireless LANs, Second Edition 7
Telecommunications Links
Figure 1-7: Wireless office technologies
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CWNA Guide to Wireless LANs, Second Edition 8
Cellular Telephony
Figure 1-8: Browsing the World Wide Web
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CWNA Guide to Wireless LANs, Second Edition 9
Cellular Telephony
Figure 1-9: WAP communications
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CWNA Guide to Wireless LANs, Second Edition 10
Radio Frequency Identification (RFID)
Figure 1-10: RFID tag
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CWNA Guide to Wireless LANs, Second Edition 11
Wireless Technology Categories
Table 1-1: Typical wireless technologies
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CWNA Guide to Wireless LANs, Second Edition 12
Wireless LAN Applications:
• Education
• Business
• Travel
• Construction
• Warehouse Management
• Public Safety
• Healthcare
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CWNA Guide to Wireless LANs, Second Edition 13
Wireless Advantages
• Mobility: Primary advantage of wireless technology
• Easier and Less Expensive Installation: Installing network cabling in older buildings difficult and costly
• Increased Reliability: Wireless LAN technology eliminates certain types of cable failures and increases overall network reliability
• Disaster Recovery: Documented disaster recovery plan vital to every business
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CWNA Guide to Wireless LANs, Second Edition 14
Wireless Disadvantages
• Security: Wireless signals broadcast in open air
• Radio Signal Interference: Signals from other devices can disrupt wireless transmissions
• Health Risks: Wireless devices emit RF energy