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1- internet1 - CSE 486/586 Distributed Systems The Internet...

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CSE 486/586, Spring 2012 CSE 486/586 Distributed Systems The Internet in 2 Hours: The First Hour Steve Ko Computer Sciences and Engineering University at Buffalo
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CSE 486/586, Spring 2012 Today and Monday A brief overview of the Internet Two things The design philosophy of the Internet (“The Design Philosophy of the DARPA Internet Protocols” by David Clark): today layers: Monday Obviously can’t replace a networking course; please take it if you haven’t---it’s interesting! Why teach these? Because I want to ;-) If there’s no network, there’s no distributed system. Not just that: the design of the Internet is a great example of designing a solid distributed system. 2
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CSE 486/586, Spring 2012 What Is the Internet? 1969 3
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CSE 486/586, Spring 2012 What Is the Internet? 1977 4
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CSE 486/586, Spring 2012 What Is the Internet? Now A network of networks The fundamental goal of the original designers: interconnecting different networks by designing common protocols 5
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CSE 486/586, Spring 2012 6 Detour: What is a Protocol? Example: making an appointment Well…I think we need a better way… Please meet with me for 1.5 hours starting at 1:30pm on February 8, 2006? I can’t. I can’t. Yes! Please meet with me for 1.5 hours starting at 3:00pm on February 8, 2006? Please meet with me for 1.5 hours starting at 4:30pm on February 8, 2006?
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CSE 486/586, Spring 2012 7 Detour: What Is a Protocol? Bob: When are you free to meet for 1.5 hours during the next two weeks? Alice: 10:30am on Feb 8 and 1:15pm on Feb 9. Bob: Book me for 1.5 hours at 10:30am on Feb 8. Alice: Yes.
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CSE 486/586, Spring 2012 8 Detour: What is a Protocol? An
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1- internet1 - CSE 486/586 Distributed Systems The Internet...

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