Application
Command line network troubleshooting
User interaction
Presentation
Formats data from the Application layer to the layers below
Originally data encrypton was intended to be done here
It is sometimes called the syntax layer
Session
Interface between upper two layers and the networking layers
Upper layers don't need to know how to navagate the network
Transport
Issues orderly network traffic and identifies traffic types
Network
Provides addressing for intranet & internet traffic
Dynamic Host Configuration Protocol
Data-Link
Provides local addressing and traffic management for sub-nets
Physical
The interconnection and wiring of all active electronics above it