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,*,按一下以編輯母片文字樣式,第二層,第三層,第四層,第五層,按一下以編輯母片標題樣式,0,123456,陳鴻彬,網路技術管理進階班,-,區域網路的技術發展,講師 :陳鴻彬,國立東華大學,電子計算機中心,0,講師簡介,陳鴻彬,國立東華大學 電算中心,系統維修工程師,Tel : 03-8662500,ext,1505,Fax: 03-8662509,hbc,cc.,ndhu,.,edu,.,tw,http:/www.,ndhu,.,edu,.,tw,/,hbc,2,內容大綱,區域網路的定義,區域網路的特性,區域網路之結構,Layer,的觀念與通訊協定之關係,IEEE 802,計劃,傳輸媒介,區域網路的元件,區域網路的應用,3,區域網路的定義,IEEE,定義,通訊系統,數台彼此獨立的電腦,適當範圍內,5,KM,以下,適當速率,1100,Mbps,直接進行溝通,4,區域網路的定義,以涵蓋地理範圍區分,LAN,Local Area Network,5 KM,以內,Ethernet, Token Bus, Token Ring,MAN,Metropolitan Network,5 KM 50 KM,DQDB (Distribute Queue Dual Bus),5,區域網路的定義,以涵蓋地理範圍區分,WAN,Wide Area Network,50 KM,以上,由電信單位提供,Packet Switched Data Network (,分封交換數據網路),ISDN (,整合服務數位網路,),B-ISDN (Broadband Integrated Services Digital Network),Internet,超級的廣域網路,6,LAN,的基本,條件,Data rate of 1 to 100,Mbps,Geographic distances spanning at most 1-5 km,Ability to support several hundred independent devices,Simplicity, or use of the simplest mechanisms that have the required functionality and performance,LAN,的特性,Reliability,Minimal dependence on any centralized components or control,Efficient use of shared resources, including the network channel,Stability under high load,Fair access (bandwidth, delay) to the network by all devices,LAN,的特性,Easy installation,Ease of reconfiguration and maintenance,Low cost,區域網路之結構,構成,LAN,之元件,Node,Host,IMP (Interface Message Processor),訊息交換與資料傳輸,Circuits,連接各,Node,之,Medium,10,區域網路之結構,Computers (Networking devices),Transmission System (Network Cards, Cabling),傳輸媒介,:,同軸電纜,雙絞線,光纖,無線電波 等等,工作站,工作站,工作站,工作站,工作站,區域網路之結構,Topology,Star,需,Central Controller,Switching,ATM (Asynchronous Transfer Mode),變形,Snowflake,若,Central Controller,損壞則失去通訊能力,12,區域網路之結構,Topology,Ring,Point-to-Point,連接形成,Ring,順時針,or,逆時針單一方向傳送,需,Token,IEEE 802.5 Token-Ring,可藉由,Bridge,將數個,Ring,連接形成更大的環狀網,Cable,為最脆弱之部份,變形,Dual Ring,FDDI,13,區域網路之結構,Topology,Bus,具,BroadCast,的特性,IEEE 802.3 CSMA/CD Ethernet,IEEE 802.4 Token-Bus,Cable,為最脆弱之部份,變形,Tree,Dual Bus,IEEE 802.6 DQDB,14,LAN Extension,網路區段 1,網路區段 2,訊號增益器,Layering Concept,第,N-1,層,第,N,層,服務點,第,N+1,層,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊軟體,第,N-1,層,第,N,層,第,N+1,層,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊軟體,通訊協定,通訊協定,系統,A,系統,B,Service Access Point (SAP),Layer N provides services for layer N+1 by using the services,provided by layer N-1.,Layering Protocols,應用層,表達層,會議層,傳輸層,網路層,鏈結層,實體層,應用層,表達層,會議層,傳輸層,網路層,鏈結層,實體層,應用軟體,X,鏈結層通訊協定,傳輸媒介,應用軟體,Y,網路層通訊協定,傳輸層通訊協定,會議層通訊協定,表達層通訊協定,應用層通訊協定,實體層通訊協定,系統,A,系統,B,通信協定機本功能,Encapsulation/,Decapsulation,Segmentation/,Reassembly,Connection Establishing,Flow Control,Error Control,Multiplexing,資料傳送之拆裝過程,應用層,表達層,會議層,傳輸層,網路層,鏈結層,實體層,應用層,表達層,會議層,傳輸層,網路層,鏈結層,實體層,應用軟體,X,AH,PH,SH,TH,NH,資料,資料,資料,資料,資料,資料,資料,F A C,FCS F,位元串,通訊路徑,應用軟體,Y,往下送時訊框包裝,往上送時訊框拆裝,IEEE Project 802 Standards,IEEE 802.1 High Level Interface,IEEE 802.1D Local Bridge (Spanning Tree Algorithm),IEEE 802.1G Remote Bridge,IEEE 802.2 LLC (Logical Link Control),IEEE 802.3 CSMA/CD (Carrier Sense Multiple Access with Collision Detection,IEEE Project 802 Standards,IEEE 802.4 Token-Bus,IEEE 802.5 Token-Ring,IEEE 802.6 DQDB (Distributed Queue Dual Bus),IEEE 802.7 Broadband Technical Advisory Group,IEEE 802.8 Fiber Optic Technical Advisory Group,IEEE Project 802 Standards,IEEE 802.9 Integrated Voice and Data LAN Working Group,IEEE 802.10 LAN Security Working Group,IEEE 802.11 Wireless LAN,IEEE 802.12 Demand-Priority (100VG-,AnyLAN,),802.3,CSMA/CD,802.4,Token-Bus,802.5,Token-Ring,802.6,DQDB,802.9,Isochronous,802.11,Wireless,802.12,100,VG-,AnyLAN,Ethernet,LAN,AX3T9.5,FDDI,802.2,LLC,802.1,網路連結技術,實體層,媒介擷取層,鏈結層,IEEE Project 802 Standards,802.14,CATV,(MAC,),基頻 / 寬頻,BaseBand,數位式信號,雙向性傳輸,TDM (Time Division,Multiplexer,),技術,數公里遠,24,基頻 / 寬頻,BroadBand,類比式信號,單向性傳輸,FDM (Frequency Division,Multiplexer,),技術,數十公里遠,25,IEEE 802.3,CSMA/CD,Carrier Sense Multiple Access with Collision Detection,載波多重存取/碰撞偵測,Base Band,10 Base 2,5,Segaments,30,台/,Seg,185M/,Seg,RG58 A/U,26,IEEE 802.3,10,Base 5,5,Segaments,100,台/,Seg,500M/,Seg,RG-11,10 Base T,UTP,27,IEEE 802.3,10,Base F,Fiber Optical (MM),10,Mbps,Ethernet,28,IEEE 802.4,Token Bus,75, CATV Cable,Broad Band,Node,間最大距離,1,kM, 10KM,Single Bus or Dual Bus,1,5,10,Mbps,29,IEEE 802.5,Token Ring,75, CATV Cable,Base Band,UTP/STP,4Mbps/4.16Mbps,Ring,Max (72,台,/,260台),Max (120M/200M),30,傳輸媒介,Coaxial Cable,Twis,-Pair,Fiber Optical,31,區域網路的元件,Computer,網路卡,網路卡,Driver,傳輸媒介,Communication Protocol,NOS (Network Operating System),網路設備,32,區域網路的應用,共享檔案(硬碟空間)資源,共享印表機資源,網路通信,資料庫系統,33,he End,0,國立東華大學,34,
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