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?
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 ➢……