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Lecture 4 :Distributed computing infrastructure
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- 1Distributed computingA distributed system is characterized as a collection of heterogenous networked computers , which communicate and coordinate their actions by passing messages
-distribution is transparent to the user so that the SYSTEM appears as a single integrated facility
One important characateristic of a distributed system is that processes are not executed on a single processor, but rather span a number of processeors
-this requires inter-process communication mechanisms - 2Internet protocolsInternet protocols are essentially methods of data transport across the internet. they define the standards by which the different components in a distributed system communicate across the internet with each other & with remote components
the most prominent of the internet protocols is the transport control protocol over the internet (tcp/ip) which provide for the reliable delivery of streams of data from one host to another across the internet
-the internet protocol (IP) enables athe unreliable delivery of individual packets from one host to another
IP makes no gurantee as to whether the packet will be delivered , how long willl it take , or if multiple packets will arrive in the order they were sent
-the transport control protocol adds the notions of connection and reliability - 3the TCP/IP protocol stack and its relation to the ISO reference modelthe data link layer provides the interface to the actual network hardware
the inter-network layer is responsible for routing blocks of data from one host to another
the transport layer provides end-to-end data trnsfer by delivering data between the client and server sides of the application
the application layer is responsible for supporting network applications - 4Middlewaremiddleware provides a functional set of interfaces to allow an application to
-locate applications transparently across the network - 5client-server modelA client/server architecture in which processing and storage tasks are
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- 2 Information and communication architecture Fichas sobre Lecture 4 :Distributed computing infrastructure, creado por Yasmine El Shinawi el 27/05/2021.
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- Yasmine El Shinawi
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