Fundamentals of Network .General introduction .Local area network .Internet .Webpage design
1 Fundamentals of Network •General introduction •Local area network •Internet •Webpage design
General introduction What is the computer network A computer network,often simply referred to as a network,is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information Network techniques: 打印机服务器 通信设备 点 笔记本 通信线路 Communication 数据库 服务器 通信系统 Computer science 大型机 微型机 微型机 工作站
2 General introduction What is the computer network ? A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information Network techniques: Communication Computer science 服务器 微型机 微型机 工作站 笔记本 大型机 通信系统 通信设备 通信线路 服务器 打印机 数据库
Network structure 0………小0 Resource subnetwork Communication : subnetwork :
3 Network structure Communication subnetwork Resource subnetwork
What are the functions of the network? e.g.email,e-businnes,etc. > Data communication > Resource- e.g.share the hardware,software and sharing data resource > Distributed Divide the complicated problem into processing sub problems to process,e.g. train/airplane tickets sell
4 ➢ Data communication ➢ Resourcesharing ➢ Distributed processing e.g. email, e-businnes, etc. e.g. share the hardware, software and data resource Divide the complicated problem into sub problems to process, e.g. train/airplane tickets sell What are the functions of the network?
Resource sharing 打印机 服务器 Hardware Data 数据库 服务器 Software 5
5 Resource sharing Hardware Data Software
Cloud computing Why do we need the cloud computing? What is the target of the cloud computing? How to access it?(e.g.browser)
Cloud computing • Why do we need the cloud computing? • What is the target of the cloud computing? • How to access it? (e.g. browser) 6
What is the cloud computing? Cloud computing is the delivery of computing as a service rather than a Application product,whereby shared 興 Montorng resources,software,and nan ce Content Platform information are provided to computers and other object Stor devices as a utility (like the Infrastructure electricity grid)over a Compute network(typically the lock Storage Internet). Cloud Computing
What is the cloud computing? • Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a utility (like the electricity grid) over a network (typically the Internet). 7
ONG Amazon elastic computing cloud (EC2) SOAP over HTTPS EC2 instance 3 Cloud computing clients EC2 instance 1 EC2 instance 2
Applications SaaS User ·Yahoo email Web appicaions ·Amazon Web Services Saas Provider/Cloud User 。 Google Docs Utility computing Cloud Provider
Applications • Yahoo email • Amazon Web Services • Google Docs
Internet of things Internet of things:From anytime,any place connectivity for anyone,we will now have connectivity for anything >Auto-alarm i for wrong driving operations Your suitcase will remind you of something missing Washing machine will tell you the required temperature >…
◼ Internet of things：From anytime, any place connectivity for anyone, we will now have connectivity for anything. Internet of things ➢Auto-alarm for wrong driving operations ➢ Your suitcase will remind you of something missing ➢ Washing machine will tell you the required temperature ➢……