| What is a network? |
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| ä | A
network is a distributed application which |
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| delivers
information between processes in a |
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| distributed
system |
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| ä | Typically
provides two classes of service: |
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| ä | reliable
stream (connection-oriented): in-order |
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| delivery
of information is guaranteed (telephone |
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| system
model) |
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| ä | unreliable
datagram (connectionless): information is |
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| delivered
on a best-effort basis (post office model) |
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