computer networking

Understanding the mystical OSI Model explained in simple terms

 Understanding computer network technologyAs you begin your quest to learn computer networking one of the first tasks you have before you is a basic understanding of the OSI model.

For many folks understanding the OSI model is like trying to understand some mystical formula that controls the way computer networks operate.

As we help you to begin your journey to understanding computer networking We will tackle explaining the complex subject of the computer networking OSI model simple terms in hopes that you will gain an understanding of the reasons behind the definitions

You can find a lot of resources that define the components of the OSI model, but an understanding of the reasons behind the definitions will go a lot way to fully understanding this complex technology model.

The acronym and the organization behind it can get confusing. The formal name for the OSI model is the Open Systems Interconnection model. Open Systems refers to a cooperative effort to have development of hardware and software among many vendors that could be used together. The model is a product of the International Organization for Standardization (2) which is often abbreviated ISO.

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The Internet Family of Protocols The TCP/IP protocol suite

TCP/IP protocol suite graphiicThe Internet Model of computer networking is not merely a reduced version of the OSI Reference Model with a straight line comparison of the four layers of the TCP/IP model to seven layers of the OSI model, as we explain here, and in the next page on the difference between the Internet and OSI reference model

The Internet protocol suite commonly known as TCP/IP is a set of communications protocols used for the Internet and similar networks. TCP/IP is not a single protocol, but rather an entire family of protocols.

The network concept of protocols establishes a set of rules for each system to speak the others language in order for them to communicate. Protocols describe both the format that a message must take as well as the way in which messages are exchanged between computers.

Transmission Control Protocol (TCP) and the Internet Protocol (IP), were the first two members of the family to be defined, consider them the parents of the family. Protocol stack describes a layered set of protocols working together to provide a set of network functions. Each protocol/layer services the layer above by using the layer below.

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