OSI Model

 

The 7 OSI layers

The OSI 7 layer model illustrates how information moves from a sender to a receiver and back again. This image illustrates the 7 layers of OSI model architecture. Below, we’ll briefly describe each layer, from bottom to top.

• The Physical Layer
• The Data Link Layer
• The Network Layer
• The Transport Layer
• The Session Layer
• The Presentation Layer
• The Application Layer