7-Layer OSI model
The 7-layer OSI Network Communication Model is the original electronic communication architecture which formed the basis for the TCP/IP standard, which has become the de facto standard for Internet communication and the World Wide Web.
(in numerical order, not stacked order)
- Physical Layer
- Data-link Layer
- Network Layer
- Transport Layer
- Session Layer
- Presentation Layer
- Application Layer
The model itself serves only as a general guide for networked communications and provides little in the way of implementable standards, protocols or packaged software which can be readily deployed.
For this reason the 4-layer TCP/IP protocol has by far surpassed the OSI model in terms of implementation and widespread use, to the point of being a de facto networking standard.
- How OSI Works: http://computer.howstuffworks.com/osi.htm
- The 7 Layers of the OSI Model: http://www.webopedia.com/quick_ref/OSI_Layers.asp
- CISCO - Internetworking Basics: http://www.cisco.com/en/US/docs/internetworking/technology/handbook/Intro-to-Internet.html
- What is the OSI model?: http://www.tech-faq.com/osi-model.shtml