The TCP/IP or DoD model includes the following layers:
* Application
* Host-to-Host
* Internet
* Network Access
The Internet layer in the DoD model is responsible for logical addressing and routing - matching the function of the OSI model's Layer 3 (Network Layer), which handles IP addressing and packet forwarding.
MTCNA Course Material - TCP/IP vs OSI Model:
"The Internet layer of the TCP/IP model maps directly to the OSI's Network Layer and is responsible for logical addressing and routing." Rene Meneses MTCNA Study Guide - Layer Mapping Table:
"TCP/IP Internet Layer = OSI Network Layer. Handles IP routing, addressing." Other mappings:
* Application = OSI Layers 5-7
* Host-to-Host = OSI Layer 4 (Transport)
* Network Access = OSI Layers 1-2