ISO-OSI 7-Layer Network Architecture This lecture introduces the ISO-OSI layered architecture of Networks. According to the ISO standards‚ networks have been divided into 7 layers depending on the complexity of the functionality each of these layers provide. The detailed description of each of these layers is given in the notes below. We will first list the layers as defined by the standard in the increasing order of function complexity: 1. Physical Layer 2. Data Link Layer 3. Network Layer
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Chapter 2 Network Models Copyright © The McGraw-Hill Companies‚ Inc. Permission required for reproduction or display. Chapter 2: Outline 2.1 Protocol Layering 2.2 TCP/IP Protocol Suite 2.3 OSI Model 1.# 1 Chapter 2: Objective The first section introduces the concept of protocol layering using two scenarios. The section also discusses the two principles upon which the protocol layering is based. The first principle dictates that each layer needs to have two opposite tasks
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TCP/IP Networking Model IT283 Professor Hennel Unit 2 assignment April 3‚ 2017 Margaret Webb Type of Service (ToS)‚ now known as Distinguished Services Code Point (DSCP) (usually set to 0‚ but may specify exact Quality of Service requirements from the network‚ the DSCP describes the way routers would queue packets although they are waiting to be progressed). Time To Live (Amount of hops /associations which the packet could be routed over‚ decremented by utmost routers - used to stop
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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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4 OSI Transport Layer 4.1 Roles of transport Layer 4.1.1 Purpose The Transport layer provides for the segmentation of data and the control necessary to reassemble these pieces into the various communication streams. Its primary responsibilities to accomplish this are: Tracking the individual communication between applications on the source and destination hosts Segmenting data and managing each piece Reassembling the segments into streams of application data Identifying the different applications
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TCP/IP Protocol Suite (Internet Model) Comparison of Network Models 1. OSI Model (Open System Interconnect) 2. Internet Model (TCP/IP Model) TCP/IP Model Application 5. Application Layer Presentation ISO Model Session 4. Transport Layer 3. Network Layer Transport Network 2. Host-to-Network Data Link 1. Physical Layer Physical 1 Comparison of Network Models TCP/IP is ussed in the Internet. Common mechanism that is gaining on/surpassing the OSI Model. Data Flow in TCP/IP Network Some
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The Seven Layers of the OSI Model Kevin Ludwig Bryant and Stratton College TECH 140 Khaled Sabha 12.08.2009 There are seven layers in the OSI model. Each layer has a function or purpose that is used to set up a network. The International Organization for Standardization began to develop the OSI framework in 1984. The purpose was to have each layer interact with the layer directly beneath it. The layers are starting from the top: Application‚ Presentation‚ Session‚ Transport‚ Network
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The TCP/IP Model Mr. Randy Vogl Gus Perez 19593003 The TCP/IP network model Exercise 3.3.1 What are the distinct differences between OSI and TCP/IP models? TCP refers to Transmission Control Protocol. OSI refers to Open Systems Interconnection. Model TCP/IP is developed on points toward a model the internet. TCP/IP has 4 layers. OSI has 7 layers. TCP/IP more reliable than OSI OSI has strict boundaries; TCP/IP does not have very strict boundaries. TCP/IP follow a horizontal approach. OSI follows a
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networks. It is commonly known as TCP/IP‚ because of its most important protocols: Transmission Control Protocol(TCP) and Internet Protocol (IP)‚ which were the first networking protocols defined in this standard. It is occasionally known as the DoD model due to the foundational influence of the ARPANET in the 1970s (operated by DARPA‚ an agency of the United States Department of Defense). TCP/IP provides end-to-end connectivity specifying how data should be formatted‚ addressed‚ transmitted‚ routed
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Program: Higher National Diploma in Computing Unit Name: Networking Technology Unit No.: 12 Number of Assignments for this unit 1 Full Name Student ID Intake Turnitin Score % Title Prime Bank Reference 12.2 Assessor Date Issued Date Due Date Submitted IV Date IV IV Signature Grade Unit Grade Awarded D M P R Assessor Comments Note: D-Distinction‚ M-Merit‚ P-Pass‚ R-Refer IV Signature (if sampled) Date IV Comments Assignment Feedback Student
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