Layers
Link
Definition
Link to originalData Link Layer
The data link layer enables communication within a local network.
Internet
Definition
Link to originalNetwork Layer
The network layer enables communication across independent networks.
Transport
Definition
Link to originalTransport Layer
The transport layer provides end-to-end communication services for applications.
Application
Definition
Link to originalApplication Layer (Layer 7)
The application layer of the OSI model is the topmost layer, acting as he interface between users and applications and the network.