Ch 20. Computer Network Wireless Connections. Bluetooth3G MobileWiFi Speed3Mbit/s7.2Mbit/s54Mbit/s Coverage~10MCity – wide~50M CostFree$200 - $400 /monthFree.

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Presentation transcript:

Ch 20. Computer Network Wireless Connections

Bluetooth3G MobileWiFi Speed3Mbit/s7.2Mbit/s54Mbit/s Coverage~10MCity – wide~50M CostFree$200 - $400 /monthFree Common usageMobile phone headset Mobile phoneNotebook

More secure than wireless Higher reliability: No interference due to obstruction like walls

Neat and clean, no untidy cables Flexibility around the home, can connect to the network around the house within a limited range.

IEEE a 5 Mbps IEEE b 11 Mbps IEEE g 54 Mbps IEEE n 150 Mbps Wireless Fidelity

More about Wi-Fi Access Point AP Wireless switch

Different types of AP More about Wi-Fi Access Point AP

More about Wi-Fi - HotSpot It’s a location installed with AP Coffee Shop

More about Wi-Fi - HotSpot It’s a location installed with AP PCCW Wifi

More about Wi-Fi – Gov Wifi Aimed to build Hong Kong Into a wireless City. Both secured & unsecured wifi are available. 100% Free!!

More about Wi-Fi – Gov Wifi Where you can find it? Recreational Facilities

More about Wi-Fi – Gov Wifi Where you can find it? Public Libraries

More about Wi-Fi – Gov Wifi Where you can find it? Sport Venus

More about Wi-Fi – Security Wireless security is very important to protect your data and privacy

More about Wi-Fi – Security Wi-fi Protected Access (WPA WPA2) Data encrypted using a network key during data transmission.

More about Wi-Fi – Security Unsafe protection method Wired Equivalent Privacy (WEP) Don’t use it!!!