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公司局域网络连接设计.doc

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CONTENTS PART ONE LAN Technologies And WAN Technologies Chapter 1 LAN Technologies 1.1 LAN overview 5 1.1.1 LAN concept 5 1.1.2 LAN composition 6 1.2 LAN technology 7 1.2.1 System structure and agreements 7 1.2.2 Transmission medium 7 1.2.3 network topology 8 1.2.4 Router 11 1.2.5 Gateway 13 Chapter 2 WAN Technologies 2.1 WAN overview 14 2.1.1 WAN overview 14 2.1.2 WAN type 15 2.2 WAN technologies 15 2.2.1 WAN technologies 15 2.2.2 Packet switching 16 2.2.3 Routing 17 2.2.4 Congestion control 21 2.2.5 Packet switching 16 PART TWO DESIGN Chapter 3 Lan Design 3.1 Network selection 26 3.2 network design 27 3.3 Summary 33 Abstract It`s includes three parts: LAN Technologies, WAN Technologies and company local area network connection design. LAN composition is divided into network hardware and network software two parts. Network hardware mainly includes web server, workstations, peripherals, network interface card, transmission medium. LAN network software, mainly including agreement software and network operating system. A router is the network layer of network interconnection equipment. The typical private sidings network using special analog circuits, E1 line etc. WAN technologies Network can be divided into exchange network and broadcast networks, in exchange network is divided again circuit switched network and packet switching network (including frame relay and ATM); While in radio network includes bus network, ring network and the astral network. (3) congestion control: into the network traffic must with network throughput coordinated to get effective and stable and good performance. (2) a packet-switching network can implement data rate conversion.. The routing algorithm suitable for network topology more stable and network the relatively small size of the network. (2) dynamic routing algorithm in dynamic routing algorithm used in:, each router through its neighbors communication, and constantly learning network state. In all of the packet switching networ