The WAN A natural extension of the LAN is the wide area network (WAN). A WAN connects remote LANs and ties remote computers together over long distances. The WAN provides the same functionality as the individual LAN‚ but on a larger scale - electronic mail‚ applications‚ and files can now move throughout the organization-wide internet. WANs are‚ by default‚ heterogeneous networks that consist of a variety of computers‚ operating systems‚ topologies‚ and protocols. The most popular internetworking
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OSI Model Kenneth Andrews IT/240 August 8th‚ 2013 David Lindsey Axia College Material Appendix C OSI Model Key Terms Table Use the table to define the key terms related to the OSI Model. Describe the functions of any hardware connectivity devices and tools listed. Term | Definition | Function (if applicable) | Physical layer | Allows hardware to interact with physical device | Communication of sending and receive data from physical hardware. | Data link layer | This layer
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Introduction to the OSI Reference Model The International Organization for Standardization (ISO) defined the Open Systems Interconnection (OSI) reference model to standardize networking of devices from different vendors. The OSI reference model is mostly an architecture blueprint that networking and computer device manufacturers implement. The OSI model has never been implemented exactly as defined. The TCP/IP protocol stack is the closest implementation available today. Application Layer (7) This
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7. How do local area networks (LANs) differ from metropolitan area network (MAN)? A local area network (LAN) is a group of microcomputers located in the same general area. It covers a clearly defined small area‚ such as an office‚ home network ‚one floor or work area‚ a single building‚ or a group of buildings. While a metropolitan area network (MAN) connects LANs and BNs located in different areas to each other and to WANs. MANs typically span between three and 30 miles. For example a large university
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Secretary Maria and the OSI Network Model Mr. Boss meets Maria on the 7th floor of the main building headquarters. He gives Maria a secret message that must get to the US Embassy across town. Maria proceeds to the 6th floor where the message is translated into an intermediary language‚ encrypted and miniaturized. Maria then takes the elevator to the 5th floor where she checks the message to be sure it is all there and puts some checkpoints in the message so her counterpart at the US Embassy
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1. Physical Layer. Is the physical connection between the sender and the receiver. It includes all the hardware devices (computers‚ modems‚ and hubs) and physical media (cables and satellites). This layer specifies the type of connection and the electrical signals‚ radio waves‚ or light pulses that pass through it. 2. Data Link Layer. Is responsible for moving a message from one computer to the next computer in the network path from the sender to the receiver. This layer has 3 functions: a
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Attacks on layer two of the OSI model Seven layers of OSI In 1977 a model called Open Systems Interconnection (OSI) was proposed‚ with the aim to establish an interoperability standard for different vendor products. This model defines several layers related to data transfer‚ from the lowest (physical) to the highest (application) layer. They have a strong dependence upon one another and headers are usually added when traversing from a lower layer to a higher one. The seven layers are: Layer 1 - Physical
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LAN/WAN Topology and Configuration Plan Introduction This document presents an overview of the different configuration challenges‚ methods‚ and techniques required to implement a Local Area Network (LAN) and Wide Area Network (WAN). These are useful technologies that securely connect multiple LANs in separate geographical locations. When properly configured these networking technologies provide robust features‚ increased data transfer speeds‚ and secure data connectivity required by today’s companies
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TCP/IP and OSI Reference Model First we discuss‚ what is TCP\IP and OSI model‚ why they are introduced and where they are used. In the following Section OSI Reference models explained with all layers as well as their responsibilities. Open Systems Interconnection model (OSI model): OSI reference model is now considered as a primary standard for internetworking and inter computing. Today many network communication protocols are based on the standards of OSI model. In the OSI model the network/data
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This presentation was informational about SIOP. I learned that SIOP stands for Sheltered Instruction Observation Protocol Model. Sarah Eakin stated‚ “SIOP is a research-based and validated instructional model that has proven effective in addressing the academic needs of English learned throughout the United States.” SIOP consists of eight components: lesson preparation‚ building background‚ comprehensible input‚ strategies‚ interaction‚ practice/application‚ lesson delivery‚ review and assessment
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