How many layers are in OSI Layer?

OSI is of7 layers

P = Physical

D = data link

N = network

T = transport

S = session

P = presentation

A = application

There are7 Layers in OSI model.

Upper three layers (Application, Presentation, Session) provide software related functions

Lower four layers (Transport, Network, Data Link, Physical)  provide network specific functions, which are hardware related layers.

7 layer .which are application ,presentation ,session ,transport , network ,data link.physical layer

There are se7en layers in the OSI model, I learned it through this phrase, hope it might help others as well, "A Person Seems To Need Data Processing". write the initials horizontally

A = Application

P = Presentation

S = Session

T = Transport

N = Network

D = Datalink

P = Physical