Computer Networking Chapter A Top-Down Approach Introduction KUROSE ROSS a note on the use of these ppt slides We re making these slides freely available to all(faculty, students, readers) Computer delete slides(including this one)and slide content to suit your needs. They and They re in PowerPoint form so you see the animations and can add, modify Networking: A Top bviously represent a lot of work on our part. In return for use, we only ask the following Down Approach If you use these slides (e.g, in a class) that you mention their source(after all, we d like people to use our book!) th edition . If you post any slides on a www site, that you note that they are adapted from(or im Kurose, Keith ross rhaps identical to)our slides, and note our copyright of this materiaL. Addison-Wesley Thanks and enjoy! JFK/KWR March 2012 All material copyright 1996-2012 F Kurose and K.W. Ross. All Rights Reserved Introduction 1-1
Introduction 1-1 Chapter 1 Introduction Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 A note on the use of these ppt slides: We’re making these slides freely available to all (faculty, students, readers). They’re in PowerPoint form so you see the animations; and can add, modify, and delete slides (including this one) and slide content to suit your needs. They obviously represent a lot of work on our part. In return for use, we only ask the following: ❖ If you use these slides (e.g., in a class) that you mention their source (after all, we’d like people to use our book!) ❖ If you post any slides on a www site, that you note that they are adapted from (or perhaps identical to) our slides, and note our copyright of this material. Thanks and enjoy! JFK/KWR All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved
Chapter 1: Introduction Our goal: a get"feel"and terminology a more depth, detail later in course 口 approach ☆ use internet as example Introduction 1-2
Chapter 1: Introduction Our goal: ❑ get “feel” and terminology ❑ more depth, detail later in course ❑ approach: ❖ use Internet as example Introduction 1-2
计算机网络向用户提供的 最重要的功能 口连通性一一计算机网络使上网用 户之间都可以交换信息,好像这 些用户的计算机都可以彼此直接 连通一样 口共享一一即资源共享。可以是信 息共享、软件共享,也可以是硬 件共享
计算机网络向用户提供的 最重要的功能 ❑连通性——计算机网络使上网用 户之间都可以交换信息，好像这 些用户的计算机都可以彼此直接 连通一样。 ❑共享——即资源共享。可以是信 息共享、软件共享，也可以是硬 件共享
主机 因特网
主机 因特网
世界十大互连网公司(2014) 口谷歌、脸谱、阿里巴巴、亚马逊、腾迅、百度 ebay、 Priceline、雅虎和京东(20149): Google 3905 Facebook 1939 Alibaba( China)° 1650 Amazon.com 149.6 Tencent( China) 147.6 Baidu( china) 9 eBi 63.3 The Priceline Group■ 605 423 JD. com(China) 39.5
世界十大互连网公司(2014) ❑ 谷歌、脸谱、阿里巴巴、亚马逊、腾迅、百度、 ebay、Priceline、雅虎和京东(2014.9)：
世界六大互连网公司(2017) 口2017年,全球互联网公司市值排名前六位分别 是苹果、谷歌、亚马逊、 Facebook、腾讯和阿 里巴巴。放眼全球公司市值,互联网公司占据 了前五名: 2017 Global Market Capitalization Leaderboard Tech= 40% of Top 20 Companies. 100% of Top 5 Indust Rank Company Region rrent Market lue(SB) evenue (SB) Apple USA Tech- Hardware 2 Google Alphabet Tech- Internet 90 Microsoft USA Tech- Software 540 Tech- Internet Tech- Internet 6 Berkshire Hathaway USA Financial Services 8 Johnson Johnso Healthcare 9 Tencent China Tech- Internet 335 10 Alibaba Tech-Intemel 11 JP Morgan Chase Financial Services 058222068 12 ICBC Financial Services Switzerland Food Beverages 14 Wells Fargo USA Financial Services 15 Samsung Electronics Korea Tech- Hardware 259 16 General Electric USA Industrial 38 USA Retal
世界六大互连网公司(2017) ❑ 2017年，全球互联网公司市值排名前六位分别 是苹果、谷歌、亚马逊、Facebook、腾讯和阿 里巴巴。放眼全球公司市值，互联网公司占据 了前五名：
世界10大互联网公司(2018) 口苹果、谷歌、微软、脸谱、亚马逊、阿里巴巴 腾讯、百度、京东、雅虎
世界10大互联网公司(2018) ❑ 苹果、谷歌、微软、脸谱、亚马逊、阿里巴巴、 腾讯、百度、京东、雅虎
中国十大互连网公司 口腾讯、阿里巴巴、百度、京东、网易、新浪 美团点评、携程、360。其中,腾讯、阿里巴 巴、百度连续五年位居前三。(20178)
中国十大互连网公司 ❑ 腾讯、阿里巴巴、百度、京东、网易、新浪、 美团点评、携程、360。其中，腾讯、阿里巴 巴、百度连续五年位居前三。(2017.8)
BAT 口分别是B百度、A阿里巴巴、T腾讯的首 字母
BAT ❑分别是B百度、A阿里巴巴、T腾讯的首 字母