OSI Physical- The Physical Layer is the first and lowest layer in the seven layers of the OSI models. It defines the eltrical, mechanical, and other things. It transmits raw bits rather than logical data packets over a physical link connecting network nodes.
Data Link- The data link transits data accross a physical link. The data link is used with the physical adressing and flow control.
Network- This is a layer that provides connectivity on geographically driverse networks. It is concerend with the Ip.
Transport- This layer segments data into a data stream. It provides establishment, maintance and information flow.
Application- This layer is closest to the user. Provides networking to the users applications also it does not provide service to any other OSI
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