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Chapter 8 Wide Area Network(WAN) 广 域 网 - PowerPoint PPT Presentation


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Chapter 8 Wide Area Network(WAN) 广 域 网. 8.1 广域网的基本概念. 依据网络的规模,网络技术可分为三类: 局域网 LAN :能跨越一栋大楼或一个校园 城域网 MAN :能跨越一个城市 广域网 WAN :能连接多个城市,国家或大洲--广域网不仅仅只是连接许多结点中的计算机,它还必须能使得计算机之间能同时通信。. 电路交换和分组(分组)交换. 电路交换:在传输数据之前,先建立源和目的之间的连接,建立连接之后,传输数据独享连接带宽,不论有无数据传输,连接都被独占。传输结束后,要释放连接。

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Chapter 8 Wide Area Network(WAN) 广 域 网

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Chapter 8 Wide Area Network(WAN)


8.1

  • LAN

  • MAN

  • WAN





/

(store and forward)


.

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  • ,.

  • .

  • ,;

  • ,.



:

  • ();

  • ;

  • ,;

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:

  • ,,;

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  • ,.

  • .,.

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  • .


:

  • ,()

  • (TCP)


  • OSI

  • Internet



8.2



(next-hop forwarding)

  • switch2








  • Dijkstra


  • ARPANET

  • X.25

  • ISDN

  • Frame Relay

  • SMDS(Switched Multi-megabit Data Service)

  • ATM(Asynchronous Transfer Mode)



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