Answer Posted / sandeep kumar sharma
7 layers
#Application layer 7
#Presentation layer 6
#Session layer 5
#Transport layer 4
#Network layer 3
#Datalink layer 2
#Physical layer 1
it is a blue print ot OSI module according the CISCO model
CORE layer
Distribution layer
ACCESS layer
It is according to DOD(Dipartment of defeance) Model
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