Network Software

Published on February 2017 | Categories: Documents | Downloads: 20 | Comments: 0 | Views: 95
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Network Software/ Protocol Hierarchies

Protocol Hierarchies • Networks are organized as a stack of layers or levels.

layer is to offer services to • Purpose of each layer higher layers.  – Information hiding, abstraction, abstract data type, encapsulation… encapsulation… 

Layerr n on one machine carries on a • Laye conversati conv ersation on with lay layer er n on another machine.  – Layer n protocol architecture

Protocol Hierarchies  Protocol ol is an agreement between the • Protoc communicating parties on how communication is to proceed.

Layers, Protocol and Interfaces

Layers, Protocol and Interfaces  • Q: data are directly transferred from layer n on one machine to layer layer n on another an other machine? • Ans: No

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