[第4章Internet.ppt

第四部分 计算机通信管理--计算机网络 1.计算机网络系统的硬件连接 2.计算机网络系统的软件连接 3.因特网及其服务 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 为什么需要计算机网络? 共享资源 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 共享硬件示例 办公楼有若干办公室,是否每一部门都要配备 打印机呢? 否! Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 共享软件示例 本地没有某一CAD软件,但在其他地方有CAD软件, 我们要进行产品设计是否一定要买CAD软件呢? CAD 软件 可以在本地利用另一地点 的软件资源进行各种工作 不一定! Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 共享信息示例 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 计算机网络的两个主要特点 互连：计算机之间通过某种媒体连接起来 自治：计算机之间没有 主/从 关系 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 是以共享资源(硬件、软件和数据)为目的，利用某种传输媒介，将不同地点的独立自治计算机系统或外部设备连接起来所形成的系统。 局域网(Local Area Network/LAN) 广域网(Wide Area Network/WAN) 互连网(Internet) 因特网(Internet) 计算机网络(Computer Network) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 网络通信基本原理 载体可以是有线的 Evaluati