CS101.Lect09.Internetworking.ppt

CS101.Lect09.Internetworking.ppt - CS101 Lecture 09:...

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Computer Science CS101 Lecture 09: Internetworking Internet Protocol IP Addresses Routing Domain Name Services Aaron Stevens ([email protected]) 26 September 2011 Computer Science What You’ll Learn Today What does Internet Protocol actually do? What is an IP address? How do packets get where they need to go? How is an Internet domain name related to an IP address? How do applications send messages through the Internet?
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Computer Science Network Protocols Protocol A set of rules that defines how data is formatted and processed on a network. Recall (from video): Bob Kahn/BBN had been developing many different packet switching networks in 1970s Each network had its own hardware, node- addressing scheme, and protocols (http://en.wikipedia.org/wiki/Packet_switched_network) Computer Science Network Protocols Vint Cerf and Bob Khan created Internet Protocol, to connect different packet switching networks. "A Protocol for Packet Network Interconnection”, published in 1974 Open System A system which is based on published standards for how protocols should work. Interoperability of hardware and software from different vendors
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Computer Science Analogy: Intermodal Transport What do these have in common? Computer Science Internet Protocol Core ideas in Internet Protocol Each node has a logical IP address Application data separate from physical transport mechanism IP packets can travel across multiple networks Packet delivery is not guaranteed “best effort”
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Computer Science Network Addresses Each node on a network is identified by a unique address. Recall: Media Access Control (MAC) Address
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This note was uploaded on 12/16/2011 for the course CS 101 taught by Professor Stevens during the Fall '08 term at BU.

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CS101.Lect09.Internetworking.ppt - CS101 Lecture 09:...

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