Table of ContentsIntroduction..................................................................................................................................41.Network infrastructure...........................................................................................................4a)The network convergence and unified communications................................................4b)LAN types and cabling plan for the head office and branches.......................................4c)WAN connection for the head office and branches........................................................5d)Transmission media and connecting devices................................................................6e)IP and DNS management..............................................................................................62. Networked services.................................................................................................................7Intranet:................................................................................................................................7Extranet:...............................................................................................................................7VOIP:....................................................................................................................................8Email:...................................................................................................................................83a) Data Processing Facilities.....................................................................................................8Data centers:........................................................................................................................8Cloud:...................................................................................................................................93 b) Data processing model.........................................................................................................9P2P:......................................................................................................................................9Conclusion...................................................................................................................................9References................................................................................................................................10

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