Open Systems Interconnection (Osi) Model Essay Example for Free

Open Systems Interconnection (Osi) Model EssayThe two most recognized meshing advert models are The Open Systems Interconnection (OSI) model The Department of Defense (DoD) model Without the framework that network models provide, all network hardware and software would ask been proprietary. Organizations would have been locked into a single vendors equipment, and global networks like the Internet would have been impractical, if not impossible. Network models are organized into storeys, with each layer representing a specific networking function. These functions are controlled by protocols, which are rules that govern end-to-end communication between devices. Protocols on one layer will interact with protocols on the layer above and below it, forming a protocol suite or stack. The TCP/IP suite is the most prevalent protocol suite, and is the foundation of the Internet. A network model is not a physical entity there is no OSI device. Manufacturers do not always strictly adher e to a reference models blueprint, and thus not every protocol fits perfectly within a single layer. Some protocols can function across multiple layers. *** All certain material copyright 2012 by Aaron Balchunas (emailprotected com), unless otherwise noted.All other material copyright of their respective owners. This material whitethorn be copied and used freely, but may not be altered or sold without the expressed written consent of the owner of the above copyright. Updated material may be found at http//www. routeralley. com. OSI Reference Model v1. 21 Aaron Balchunas 2 OSI Reference Model The Open Systems Interconnection (OSI) model was developed by the International Organization for Standardization (ISO), and formalise in 1984. It provided the first framework governing how information should be sent across a network.