History of the OSI Reference Model Looking at the origins of the OSI Reference Model takes us back to several issues that were discussed in the Networking Fundamentals chapter of this Guide; specifically‚ I am talking about standards and standards organizations. The idea behind the creation of networking standards is to define widely-accepted ways of setting up networks and connecting them together. The OSI Reference Model represented an early attempt to get all of the various hardware and software
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Security and the OSI Model Network security is a topic that reaches far beyond the realm of firewalls‚ passwords‚ and user ID accounts. For a network and data to remain secure there must be protective measures at each level in the OSI interconnect model. While each layer basically operates autonomously of the other it is important to ensure that the data being transmitted from the host to destination has not been tampered with or is being prevented from reaching its destination. There are
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Chapter 1. The TCP/IP and OSI Networking Models Page 1 of 22 Chapter 1. The TCP/IP and OSI Networking Models This chapter covers the following exam topics: Operation of IP Data Networks Recognize the purpose and functions of various network devices such as Routers‚ Switches‚ Bridges and Hubs. Select the components required to meet a given network specification. Describe the purpose and basic operation of the protocols in the OSI and TCP/IP models. Welcome to the first chapter in your
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• • Become familiar with WAN terminology. Learn about different types of WAN connections. Become familiar with different types of WAN equipment. Introduction to WAN Technologies This chapter introduces the various protocols and technologies used in wide-area network (WAN) environments. Topics summarized here include point-to-point links‚ circuit switching‚ packet switching‚ virtual circuits‚ dialup services‚ and WAN devices. Chapters in Part III‚ “WAN Protocols‚” address specific technologies
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Friday‚ September 24‚ 2010 JANN VINCENT PAUL C. LAGMAY BSIT-1A Open System Interconnection (OSI) The Open System Interconnection Reference Model or OSI Reference Model or OSI Model is essentially a conceptual description for layered communications and computer network protocol design. It was created as part of the Open Systems Interconnection or OSI initiative. In its most fundamental form‚ it separates network architecture into seven distinct layers: the Application‚ Presentation‚ Session
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OSI Model This memorandum will attempt to explain the Open Systems Interconnection Model‚ known more simply as the OSI Model. The OSI Model has seven levels‚ and these levels will be discussed in detail. Particular mention will be made to which level TCP/IP functions with the OSI Model. The seven levels of the OSI Model are as follows: 7) Application: Provides different services to the applications. 6) Presentation: Converts the information. 5) Session: Handles problems which are not communication
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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 Reference Model 1 - OSI Reference Model Network Reference Models A computer network connects two or more devices together to share information and services. Multiple networks connected together form an internetwork. Internetworking present challenges - interoperating between products from different manufacturers requires consistent standards. Network reference models were developed to address these challenges. A network reference model serves as a blueprint‚ detailing how communication
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Layman View of OSI Reference Model (By Diganta Deka‚ Former Student‚ Proprietor-Trainer East India Technologies‚ Guwahati.)‚ diganta.deka@hotmail.com When we talk about computer networks and how computers operate in networks‚ things do not remain as simple as it seems to be. Here numerous protocols work in tandem for the sake of data integrity during the course of data transfer. To make things worse there are a lot of vendors in the market who provide and produce great number
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WAN Design Today’s network administrators must manage complex wide-area networks (WANs) in order to support the growing number of software applications that are built around Internet Protocol (IP) and the Web. These WANs place a great demand on network resources‚ and require high-performance networking technologies. WANs are complex environments that incorporate multiple media‚ multiple protocols‚ and inter-connection to other networks‚ such as the Internet. Growth and manageability of these network
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