1 ICS132-introduction

1 ICS132-introduction - ICS 132 Intro. to Computer Networks...

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ICS 132 Intro. to Computer Networks troduction Introduction Tatsuya Suda Dept. of Infor. And Comp. Science University of Cal., Irvine
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ourse Goals Course Goals
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hat is a Network? What is a Network? Carrier of information between 2 or more entities Interconnection may be any medium capable of communicating information: copper wire lasers microwave satellite link xample: Ethernet Example: Ethernet
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hy Networks? Why Networks? Availability of Resources Resources become available regardless of the user’s physical location Load Sharing Jobs processed on least crowded machine High Reliability Alternative source of supply (multiple copies) Human-to-Human Communication e.g., Telephone, IP telephony
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hat is Internet Technology? What is Internet Technology? What is an internet? etwork of networks Network of networks What is the Internet? A global internet based on the IP protocol To what does “Internet technology” refer? Architecture, protocols and services
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ample Internet Applications Sample Internet Applications Electronic mail Remote terminal File transfer Newsgroups gp File sharing esource distribution Resource distribution World Wide Web ideo conferencing Video conferencing Games
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pact of the Net on People Impact of the Net on People Access to remote information W assignments from my server HW assignments from my server Person to person and group ommunication communication email, collaborative tools teractive entertainment Interactive entertainment Corporate video, news clips
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pact of the Net on Society Impact of the Net on Society The good ccess to information, e- ommerce Access to information, e commerce The bad rudge report gossip too much drudge report, gossip, too much information, jenny cam he ugly The ugly Fraud, pornography But, it is just a mirror of society
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ternet Players Internet Players Users, people who use the applications – Everyone (mom and pop, kids) et something done (hopefully useful) – get something done (hopefully useful) Designers – You: protocol design and implementation – performance, cost and scale Service Providers – Administrators and ISPs anagement revenue deployment – Management, revenue, deployment
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ourse Goals Course Goals Understand the basic principles of computer networks Understand the Internet and its rotocols protocols Understand the key design principles sed to build networks andthe Internet used to build networks andthe Internet
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verview of Computer Networks Overview of Computer Networks
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Overview of the Principles of omp ter Net orks Computer Networks 1. Physical communication 2. Error control 3. Flow control 4. Data switching 5. Routing Congestion Control 6. Congestion Control 7. Shared Medium Access Protocols 8. Protocols
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ome Definitions Some Definitions Network : Collection of interconnected machines Host : Machine running user application Subnet
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1 ICS132-introduction - ICS 132 Intro. to Computer Networks...

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