TCP/IP -OSI (5 layer)
TCP/IP (Transmission Control Protocol/Internet Protocol) has many different versions. The 5 layer version is made up of the following layers: Physical, Data Link, Internet, Transport, and Application. TCP/IP are general rules and protocols that allow computers to communicate over a network.
1st Layer - Physical Layer: Specific standards govern transmission between devices that are connected by a transmission medium. The physical layer is the relationship between electronics and the transmission medium in the use of pins, hubs, or network adapters.
2nd Layer - Data Link Layer: The Data Link layer is responsible for the standards that govern the transmission of frames across a single network. The Data Link layer also governs frame organization, timing constraints, and reliability. Now a days, the Data Link layer is used only to correct errors in transmission instead of point-to-point transmission.
3rd Layer - Internet Layer: The Internet Link layer is responsible for the standards that travel across the Internet. The Internet layer also governs packet organization, timing constraints, and reliability. This layer is important because it is responsible for the destination of transmission to a different location than the host.
4th Layer - Transport Layer: The Transport layer governs aspects from end-to-end communication that are not controlled by the Internet layer. The transport layer is unique because it allows computer hosts to work together despite being from different vendors and having different internal designs.
5th Layer - Application Layer: The Application Layer governs how two applications work with each other. The application layer is the closest to the end user.
TCP/IP is very important to communicate over the Internet. These protocols establish rules that allow different hosts and different vendors to communicate over networks that are not in the same location.
The Open Systems Interconnection Model is a model that is based on the idea to standardize networks in order to make the Internet easy and simple to use. The TCP/IP model is not as strictly designed. These are two different models, although they are often compared to each other, they are a bit different.