Please Tweet angrily at me if you disagree. All hosts are nodes, but not all nodes are hosts. I will define a host as a type of node that requires an IP address. router.įor the nitpicky among us (yep, I see you), host is another term that you will encounter in networking. Typically, routers connect networks to the Internet and switches operate within a network to facilitate intra-network communication. Nodes may be set up adjacent to one other, wherein Node A can connect directly to Node B, or there may be an intermediate node, like a switch or a router, set up between Node A and Node B. If set up properly, a node is capable of sending and/or receiving information over a network.
NodesĪ node is a physical electronic device hooked up to a network, for example a computer, printer, router, and so on. I’ll use these terms when I talk about OSI layers next. Here are some common networking terms that you should be familiar with to get the most out of this article. The difference between TCP/IP model and the OSI model.The problems that can happen at each of the 7 layers.Over the course of this article, you will learn: Basic familiarity with common networking terms (explained below).You don’t need any prior programming or networking experience to understand this article. Once you learn the OSI model, you will be able to further understand and appreciate this glorious entity we call the Internet, as well as be able to troubleshoot networking issues with greater fluency and ease.
It is a tool for understanding how networks function. Therefore, it’s important to really understand that the OSI model is not a set of rules. Learning networking is a bit like learning a language - there are lots of standards and then some exceptions.
In plain English, the OSI model helped standardize the way computer systems send information to each other. The OSI model is a conceptual framework that is used to describe how a network functions. This article explains the Open Systems Interconnection (OSI) model and the 7 layers of networking, in plain English.
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