第九章 無線網路
DESCRIPTION
第九章 無線網路. 9.1 簡介. 在二十一世紀,整個網際網路儼然成為全球資訊流的大通道。資訊已不在是僅存在於個人電腦上,而是在網路上,而存取網路資訊的工具將是網頁瀏覽器。網頁瀏覽器將成為世界共通的網際網路通訊設備的圖形化介面應用工具。 沒有任何應用系統只能單單在某一特定的電腦設備上執行,資訊的存取將變得更有彈性。 網際網路將取代傳統的個人電腦角色,新一代的個人電腦將不再是只能在單一作業平台上提供服務,而 移動可攜式電腦( mobile portable computing devices )成為一重要觀念及技術。. - PowerPoint PPT PresentationTRANSCRIPT
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9.1 mobile portable computing devices
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9.2 (peer to peer wireless network)IrDAInfrared Data Association19936 IrDA19600bps115.2Kbps4Mbps
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19996Windows98IrDAWindows98PC
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9.3 Wireless LAN(1)(2)(3)
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IEEE 802.11(1)(2)multiple transfer rate(3)DCFdistributed coordination functionPCFpoint coordination function(4)bandwidth(5)(6)IEEE 802.11 (1)Station Services, SS(2)Distribution System Services, DSS
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IEEE 802.11
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Infrastructure Wireless LANaccess pointAd Hoc Wireless LAN
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9.4 WAPWAP InternetIntranetcellular phonemobile hostWAP Forum WAP
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WAP(World Wide Web)HttpCPU WAPWML(Wireless Markup Language)HTMLHTML/WMLWAP GatewayWAPWAP(1)(2)(3)(4)
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WAP
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Wireless Application EnvironmentWAEWWWWAEWAPWireless Session ProtocolWSPWSPWTPWDPWireless Transaction ProtocolWTPWTPWDP
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WAP(1)ClientWWW WAP (2)ClientWAP
WAP
Client ()
WAP
WWW
WWW
WAP
WAP
WAP
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WAPWMLWML1.4KbyteGSM 9.6Kbps56KbpsGPRS110KbpsWAP
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Wireless Transport Layer SecurityWTLSWTLSIndustrial Standard TLS Protocol(Secure Sockets Layer,SSL)Wireless Datagram ProtocolWDPWDPWAPBearerWAP(SMSShort Message Service)(Packet Data)(Circuit-switched Data)
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9.5 -
(FDDI)-LACE Model 0B2000E
LACE Model 0B2000ELACE Model 0B2000E
(FDDI)
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WAP -WAPWAPWML(Wireless Markup Language)
()
9
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Windows98Digital RoamAbout-Digital RoamAboutDigital RoamAbout http://www.edu.tw/
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:(1)(2)(3)(4)-(5)-(6)Windows98ping 140.129.26.113-