OSI layers by function
Group the OSI layers by function in brief.
Expert
The seven layers of OSI model belong to three sub-groups as:
Network support layers: Comprising of Physical, data link and network layers and they deal with the physical features of moving data from one device to the other.
User support layers: Comprises of Session, presentation and application layers and they permit interoperability among unrelated software systems.
The transport layer makes sure end-to-end reliable data transmission
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