Data Link Layout Questions

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Flow Control & Error Detection in OSI model
In the OSI model, why does the Error Detection & Flow Control happen 2 times? As i know, these two happen in the DataLink layer and after that in the Transport layer. Whats the reason of checking them two times? Thanks

Answer Question   |  October 29, 2010  3:09 PM
Data Link Layout, Error detection, Flow Control, OSI, OSI Model
asked by:
10 pts.

Network physical and data link layout
How to design the Physical Layout and Data Link Layout for the data transfer from PC to PC througt RF tranceiver?

Answer Question   |  February 1, 2010  11:58 AM
Data Link Layout, Network design, Network Physical Layout, Network Topology
asked by:
5 pts.

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