There are two theoretical models used to describe the way networking should work.

• OSI Model
• TCP/IP Model

It covers the following topics -

• History
• Layered Network Model
• Layering Concepts and Benefits
• TCP or IP Protocol Architecture
• RFC
• Application Transport Internet and Network Access Layer
• Devices at different layers
• Data Encapsulation
• The OSI Reference Model
• OSI Layers and Their Functions
• Comparing OSI and TCP or IP