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This paper proposes a topology for local computer networks. Called "Dragnet", it is similar to the Ethernet network in function, but rather different in the following respects:1. Instead of a single long bidirectional cable, there are multiple short unidirectional cables.2.
- Osi Layer 1
- Osi Layer 2
- Osi Layer 3
- Osi Layer 4
- Osi Layer 5
- Osi Layer 6
- Osi Layer 7
Layer 1 is the physical layer. There’s a lot of technology in Layer 1 - everything from physical network devices, cabling, to how the cables hook up to the devices. Plus if we don’t need cables, what the signal type and transmission methods are (for example, wireless broadband). Instead of listing every type of technology in Layer 1, I’ve created b...
Layer 2 is the data link layer. Layer 2 defines how data is formatted for transmission, how much data can flow between nodes, for how long, and what to do when errors are detected in this flow. In more official tech terms: 1. Line discipline.Who should talk for how long? How long should nodes be able to transit information for? 2. Flow control.How ...
Layer 3 is the network layer. This is where we send information between and acrossnetworks through the use of routers. Instead of just node-to-node communication, we can now do network-to-network communication. Routers are the workhorse of Layer 3 - we couldn’t have Layer 3 without them. They move data packets across multiple networks. Not only do ...
Layer 4 is the transport layer. This where we dive into the nitty gritty specifics of the connection between two nodes and how information is transmitted between them. It builds on the functions of Layer 2 - line discipline, flow control, and error control. This layer is also responsible for data packet segmentation, or how data packets are broken ...
Layer 5 is the session layer. This layer establishes, maintains, and terminates sessions. A session is a mutually agreed upon connection that is established between two network applications. Not two nodes! Nope, we’ve moved on from nodes. They were soLayer 4. Just kidding, we still have nodes, but Layer 5 doesn’t need to retain the concept of a nod...
Layer 6 is the presentation layer. This layer is responsible for data formatting, such as character encoding and conversions, and data encryption. The operating system that hosts the end-user application is typically involved in Layer 6 processes. This functionality is not always implemented in a network protocol. Layer 6 makes sure that end-user a...
Layer 7 is the application layer. True to its name, this is the layer that is ultimately responsible for supporting services used by end-user applications. Applications include software programs that are installed on the operating system, like Internet browsers (for example, Firefox) or word processing programs (for example, Microsoft Word). Applic...
Jun 12, 2024 · What is a Computer Network Architect? A computer network architect sets up the computer and communication systems for a company. “Network architecture” means the rules, tools, and software that help people in the company stay connected without any problems. Network Architect vs Network Administrator vs Network Engineer
This section defines more carefully what we mean by a network architecture by introducing the central ideas that are common to all network architectures. It also introduces two of the most widely referenced architectures—the OSI (or 7-layer) architecture and the Internet architecture.
Jul 12, 2024 · Network architecture refers to the specific design and framework of a particular network. This includes how network devices and services are structured to cater to the connectivity requirements of the network’s users.
6 days ago · It is a model used in computer networking to explain how data moves from one device to another across a network. The OSI model has 7 layers, and each layer has a specific function, from sending raw data to delivering it to the right application.
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Network architecture is the design of a computer network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as communication protocols used.
