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ProtocolĪ protocol is a mutually agreed upon set of rules that allows two nodes on a network to exchange data. When we’re talking about information being transmitted, this may also be described as a one-to-one vs. Links to can either be point-to-point, where Node A is connected to Node B, or multipoint, where Node A is connected to Node B and Node C. Links can be wired, like Ethernet, or cable-free, like WiFi. 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.
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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.
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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.