Chapter 1 Review Questions
1. There is no difference. Throughout this text, the words “host” and “end system” are used interchangeably. End systems include PCs, workstations, Web servers, mail servers, Internet-connected PDAs, WebTVs, etc.
2. Suppose Alice, an ambassador of country A wants to invite Bob, an ambassador of country B, over for dinner. Alice doesn’t simply just call Bob on the phone and say, “come to our dinner table now”. Instead, she calls Bob and suggests a date and time. Bob may respond by saying he’s not available that particular date, but he is available another date. Alice and Bob continue to send “messages” back and forth until they agree on a date and time. Bob then shows up at the embassy on the agreed date, hopefully not more than 15 minutes before or after the agreed time. Diplomatic protocols also allow for either Alice or Bob to politely cancel the engagement if they have reasonable excuses.
3. A networking program usually has two programs, each running on a different host, communicating with each other. The program that initiates the communication is the client. Typically, the client program requests and receives services from the server program.
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6.3 使用列表
列表几乎是现代所有的移动应用程序中不可分割的组成部分。它们提供了一种以易于
交互的方式向用户显示不同类型和数量的数据的简单方法。
Android 的 ListView 是一个基于行的数据显示控件，它在每行显示哪些数据以及如何
显示数据方面具有最大的灵活性。同时你还将学习 GridView，一个基于行和列的数据显示
控件。该控件负责处理所有行和列的布局。
在 Android 中，ListView 自动完成了大量的繁重工作，其中包括惯性滚动、在合适的
时间显示合适的行等。而你所需要做的就是在需要的时候向其提供布局以及每行的数据。
此外，Android 还可以通过触发事件来处理不同类型的用户交互。
很多 Android 应用程序都会使用列表。其中最突出的用途是显示和编辑用户首选项。
而其他用途还包括 RSS 阅读器、Twitter 客户端以及媒体播放器。图 6-8 显示了使用了
ListView 的不同应用程序示例，用来演示其强大功能和灵活性。
图 6-8
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《交互式计算机图形学:基于OpenGL的自顶向下方法(第5版)(英文版)》覆盖了计算机图形学基础课程中的所有主题，包括光与材质的相互作用、明暗绘制、建模、曲线和曲面、反走样、光栅化、纹理映射和图像合成等内容。
在广泛结合OpenGL并注重图形应用编程的基础上，《交互式计算机图形学:基于OpenGL的自顶向下方法(第5版)(英文版)》向读者介绍了计算机图形学的核心概念。书中代码采用C和C++语言，并使用了自顶向下和面向编程的方法，使读者能够迅速地创建自己的三维图形。在结构安排上，《交互式计算机图形学:基于OpenGL的自顶向下方法(第5版)(英文版)》在读者学会了编写交互式图形程序之后再介绍底层的算法，如线段的绘制以及多边形填充等算法。
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计算机网络-自顶向下方法-第6版。
从应用层开始沿协议栈向下讲解计算机网络的基本原理，强调应用层范例和应用编程接口，内容深入浅出，注重教学方法，理论与实践相结合。第3版的内容相应更新并反映了网络领域的最新进展，如增加了无线和移动网络一章，扩充了对等网络、BGP、MPLS、网络安全、广播选路和因特网编址及转发方面的材料；还增加了一套实用的实验，并修订了习题。本书适合作为计算机、电子、通信工程相关专业的本科生和研究生的计算机网络课程教科书，对于网络业界甚至网络科研人员，本书也是一本不可多得的参考书。
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计算机网络自顶向下方法课件ppt
研究生教材《计算机网络自顶向下方法》课件ppt，总共6个ppt
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Computer Networking: A Top-Down Approach,
6th Edition
Solutions to Review Questions and Problems
Version Date: May 2012
This document contains the solutions to review questions and problems for the 5th edition of Computer Networking: A Top-Down Approach by Jim Kurose and Keith Ross. These solutions are being made available to instructors ONLY. Please do NOT copy or distribute this document to others (even other instructors). Please do not post any solutions on a publicly-available Web site. We’ll be happy to provide a copy (up-to-date) of this solution manual ourselves to anyone who asks.
Acknowledgments: Over the years, several students and colleagues have helped us prepare this solutions manual. Special thanks goes to HongGang Zhang, Rakesh Kumar, Prithula Dhungel, and Vijay Annapureddy. Also thanks to all the readers who have made suggestions and corrected errors.
All material © copyright 1996-2012 by J.F. Kurose and K.W. Ross. All rights reserved
Chapter 1 Review Questions
There is no difference. Throughout this text, the words “host” and “end system” are used interchangeably. End systems include PCs, workstations, Web servers, mail servers, PDAs, Internet-connected game consoles, etc.
From Wikipedia: Diplomatic protocol is commonly described as a set of international courtesy rules. These well-established and time-honored rules have made it easier for nations and people to live and work together. Part of protocol has always been the acknowledgment of the hierarchical standing of all present. Protocol rules are based on the principles of civility.
Standards are important for protocols so that people can create networking systems and products that interoperate.
1. Dial-up modem over telephone line: home; 2. DSL over telephone line: home or small office; 3. Cable to HFC: home; 4. 100 Mbps switched Ethernet: enterprise; 5. Wifi (802.11): home and enterprise: 6. 3G and 4G: wide-area wireless.
HFC bandwidth is shared among the users
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