...OSI Model Open System Interconnection แบบจำลองเครือข่าย ( Network Model ) เสนอ อาจารย์ ปริญญา น้อยดอนไพร จัดทำโดย 1. นางสาวกนกอร ไกรนรา รหัสนักศึกษา 5240410501 2. นางสาวกมลชนก บัวหยาด รหัสนักศึกษา 5240410502 1. จุฑามาศ ฤทธิมนตรี 5240410516 3. นางสาวจุฑามาศ ฤทธิมนตรี รหัสนักศึกษา 5240410516 4. นายเชาวนัส นวลรัตน์ รหัสนักศึกษา 5240410521 5. นายทิชากร ศรีอาวุธ รหัสนักศึกษา 5240410530 6. นางสาวปิยะธิดา ศรีส่วน รหัสนักศึกษา 5240410549 7. นายวราพล แช่ตั้ง รหัสนักศึกษา 5240410565 8. นางสาววินิตา เพชรทอง รหัสนักศึกษา 5240410569 9. นางสาว สิริมา เพชรรัตน์ รหัสนักศึกษา 5240410578 10. นางสาวสุชากรณ์ หนูชู รหัสนักศึกษา 5240410579 8. จุฑามาศ ฤทธิมนตรี 5240410516 9. สุชากรณ์ หนูชู 5240410579 10. จุฑามาศ ฤทธิมนตรี 5240410516 11. สุชากรณ์ หนูชู 5240410579 รายงานฉบับนี้เป็นส่วนหนึ่งของรายวิชา 928-202 การสื่อสารข้อมูลและเครือข่าย มหาวิทยาลัยสงลานครินทร์ วิทยาเขตสุราษฎร์ธานี ภาคการศึกษาที่ 2 ปีการศึกษา 2553 คำนำ ในโลกปัจจุบัน คอมพิวเตอร์ ได้ก้าวเข้ามามีบทบาทในชีวิตประจำวันอย่างกว้างขวาง ทั้งในส่วนของการใช้งานโดยตรง เช่น การใช้ในองค์กรธุรกิจต่าง ๆ การควบคุมระบบการเจรจาทั้งทางบก ทางน้ำ และทางอากาศ การติดต่อสื่อสารแลกเปลี่ยนข้อมูลทั้งในระยะใกล้ไปจนถึงระยะไกล ข้ามโลก รวมไปถึงการใช้ในด้านความบันเทิงทั้งเกมส์คอมพิวเตอร์หรือภาพยน ตร์ที่สร้างด้วยคอมพิวเตอร์กราฟิก เป็นต้น ดังนั้น กลุ่มของข้าพเจ้าจึงได้จัดทำรายงาน...
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...IT331-CNS Capstone 6/28/12 OSI Model 1. Explain in detail the functions of each layer of the 7-layer OSI model. a. Layer 1 – Physical Layer – To establish and terminate the connection to a media source, it also does the conversions of data from one form to another. b. Layer 2 – Data-Link Layer – Transmits data from one point to another. c. Layer 3 – Network Layer – Transmits data from one host to another on another network. d. Layer 4 – Transport Layer – Controls the end-to-end connections, reliability, flow control of data in a network. e. Layer 5 – Session Layer – Controls connections between computers and manages application sessions in a network. f. Layer 6 – Presentation layer – This layer controls data representation and the encryption and decryption of data in a network. g. Layer 7 – Application Layer – This layer interacts with software applications that implement a communicating component. The application layer decides whether sufficient network or the requested communication exists. 2. Using the OSI model as a reference, describe how you would troubleshoot connectivity problems. h. To troubleshoot connectivity problems using the OSI model you should answer the following questions: i. Is your network cable plugged in? ii. Is there a link light on the Ethernet switch and Ethernet NIC? iii. Do you have an IP address? iv. Can you ping your default gateway? ...
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...Question: Write a 2-3 page paper describing the OSI model and how it relates to a network. Your response should include answers to the following: • On which layers of the OSI model do WAN protocols operate? • What are some of these protocols? • On which OSI layers do switches and routers operate? • If routers reside at more than one layer, what is the difference between the OSI layers? Introduction: The OSI model was introduced in 1984. Although it was designed to be an abstract model, the OSI model remains a practical framework for today's key network technologies like Ethernet and protocols like IP. The OSI model defines internetworking in terms of a vertical stack of seven layers. The upper layers of the OSI model represent software that implements network services like encryption and connection management. The lower layers of the OSI model implement more primitive, hardware-oriented functions like routing, addressing, and flow control. In the OSI model, data communication starts with the top layer at the sending side, travels down the OSI model stack to the bottom layer, then traverses the network connection to the bottom layer on the receiving side, and up its OSI model stack. How OSI model relates to a network: Information being transferred from a software application in one computer system to a software application in another must pass through the OSI layers. For example, if a software application in System A has information to transmit to a software application...
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...------------------------------------------------- OSI model From Wikipedia, the free encyclopedia OSI model | 7. Application Layer | NNTP · SIP · SSI · DNS · FTP · Gopher · HTTP · NFS · NTP · SMPP · SMTP ·DHCP · SNMP · Telnet · Netconf ·(more) | 6. Presentation Layer | MIME · XDR · TLS · SSL | 5. Session Layer | Named Pipes · NetBIOS · SAP · L2TP ·PPTP | 4. Transport Layer | TCP · UDP · SCTP · DCCP · SPX | 3. Network Layer | IP (IPv4, IPv6) · ICMP · IPsec · IGMP ·IPX · AppleTalk | 2. Data Link Layer | ATM · SDLC · HDLC · ARP · CSLIP ·SLIP · PLIP · IEEE 802.3 · Frame Relay · ITU-T G.hn DLL · PPP · X.25 | 1. Physical Layer | EIA/TIA-232 · EIA/TIA-449 · ITU-T V-Series · I.430 · I.431 · POTS · PDH ·SONET/SDH · PON · OTN · DSL ·IEEE 802.3 · IEEE 802.11 · IEEE 802.15 · IEEE 802.16 · IEEE 1394 · ITU-T G.hn PHY · USB · Bluetooth · Blue | This box: view · talk · edit | The Open Systems Interconnection model (OSI model) is a product of the Open Systems Interconnection effort at the International Organization for Standardization. It is a way of sub-dividing a communications system into smaller parts called layers. A layer is a collection of similar functions that provide services to the layer above it and receives services from the layer below it. On each layer, an instance provides services to the instances at the layer above and requests service from the layer below. For example, a layer that provides error-free communications...
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... 2 EXPLANATION OF EACH LAYER 3 THE IMPORTANCE OF EACH LAYER 4-5 CONCLUSION 5 REFERNCES 6 INTRODUCTION The open system interconnection model, better known as the OSI model. The OSI model is not a protocol, but a reference model or an abstract structure that describes the functions and interactions of various data communication protocols. But instead of serving as a model with protocols that would be used worldwide, the OSI model has become a teaching tool that shows how different tasks within a network should be handled in order to promote error-free data transmission and provides a conceptual structure that helps us computer-computer communication over a network and compare network functions. (Andrew, 2013) This review is regarding the journal article “Understanding The OSI 7-Layer” by Neil Briscoe, the author of this article, is a networking consultant and Cisco guru.This review is summarize the jounral acticle. Explain and analyze the characteristic of OSI 7-layer. THE CONCEPT This article is show that OSI model have 7-layer: : Layer 1- Physical, Layer 2- Data Link, Layer 3- Network, Layer 4- Transport, Layer 5- Session, Layer 6- Presentation, and Layer 7- Application. At each layer, protocol perform services unique to that layer. The protocol also interact with protocol in the layer directly above and below, also...
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...Papers The OSI Model: Understanding the Seven Layers of Computer Networks 1-800-COURSES www.globalknowledge.com The OSI Model: Understanding the Seven Layers of Computer Networks Paul Simoneau, Global Knowledge Course Director, Network+, CCNA, CTP Introduction The Open Systems Interconnection (OSI) model is a reference tool for understanding data communications between any two networked systems. It divides the communications processes into seven layers. Each layer both performs specific functions to support the layers above it and offers services to the layers below it. The three lowest layers focus on passing traffic through the network to an end system. The top four layers come into play in the end system to complete the process. This white paper will provide you with an understanding of each of the seven layers, including their functions and their relationships to each other. This will provide you with an overview of the network process, which can then act as a framework for understanding the details of computer networking. Since the discussion of networking often includes talk of “extra layers”, this paper will address these unofficial layers as well. Finally, this paper will draw comparisons between the theoretical OSI model and the functional TCP/IP model. Although TCP/IP has been used for network communications before the adoption of the OSI model, it supports the same functions and features in a differently layered arrangement. An Overview of the OSI Model ...
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...define and describe the OSI and the TCP/IP models including a discussion on where and how they overlap. I will discuss why I think the TCP/IP model is use and the OSI model is not, and finally what my definition of the steps of OSI and TCP/IP are and their implementation. I am going to start with the OSI model. The OSI model is made up of 7 different layer, each with their own functions. Each of the layers are defined as: 1. Physical Layer: The physical layer is responsible of delivering row bit stream over the physical cable. Its functions are physical medium transmission, transmission technique and data encoding. (Khani, 2012) 2. Data Link Layer: The data link layer is responsible for controlling the error between adjacent nodes and transfer the frames to the other computer via the physical Layer. Its functions are Link establishment and termination, frame traffic control and frame acknowledgement. (Khani, 2012) 3. Network Layer: The network layer is responsible for the translating of the logical network address and names into their physical address. Its functions are subnet traffic control, logical and physical address mapping and frame fragmentation. (Khani, 2012) 4. Transport Layer: The transport layer is responsible for the end-to-end deliveries of messages between the networked hosts. Its functions are message segmentation, message acknowledgement session and multiplexing. (Khani, 2012) 5. Session Layer: The session layer is responsible for establishing...
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...THE OSI REFERENCE MODEL The concept of how a modern day network operates can be understood by dissecting it into seven layers. This seven layer model is known as the OSI Reference Model and defines how the vast majority of the digital networks on earth function. OSI is the acronym for Open Systems Interconnection, which was an effort formed by the International Organization for Standardization in 1982 with the goal of producing a standard reference model for the hardware and software connection of digital equipment. The important concept to realize about the OSI Reference Model is that it does not define a network standard, but rather provides guidelines for the creation of network standards. The OSI has become so accurate a concept that almost all major network standards in use today conform entirely to it's seven layer model. Though seven layers may at first appear to make a network seem overly complex, the seven layer OSI Model has been proven over the past twenty years to be the most efficient and effective way to understand this extremely complex subject. OSI LAYER 1: THE PHYSICAL LAYER The first and foundational layer of a network is the Physical Layer. The Physical Layer is literally what it's name implies: the physical infrastructure of a network. This includes the cabling or other transmission medium and the network interface hardware placed inside of computers and other devices which enable them to connect to the transmission medium. The purpose of the Physical...
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...OSI MODEL Joseph Lucero College America Abstract In this paper it is going to explain the OSI model and all the layers. There are 7 layers in total: the layers are Application, Presentation, Session, Transport, Network, Data Link and Physical. It is going to explain what all the layers are and how they work in the OSI Model, it is also going to explain what every layer is. It is also going to explain why it was created and what the use for the OSI model is for today. You are going to know why we need the OSI model and how it evolved from the first time. You are also going to find out about the past history about the model and the other name is what called before. OSI Model The OSI model has been used for a long time. Why do we use it? OSI, formally known as the ISO OSI model, is the most standard model for networking communication. The ISO formed the OSI or Open System Interconnection, so that you can communicate and connect with another system over the network without having system specific configuration. The OSI model consists of 7 different layers: Physical, Data Link, Network, Transport, Sessions, Presentation, and Application. One reason why the OSI model was created, is so that the process of communication that were between two end points in a telecommunication network can be split into layers. The main reason why the OSI Model was created was to standardize the networking rules so that all the systems can communicate over the OSI reference model, which was a...
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...OSI LAYERS The Open Systems Interconnection (OSI) divides the network processes into layers. The OSI model takes a task and divides it into a series of activities which are each defined and developed individually. In ascending order those layers are: Application, Presentation, Session, Transport, Network, Data-Link, and Physical. (Hillpot & Ivy, 2005) 7 | Application | 6 | Presentation | 5 | Session | 4 | Transport | 3 | Network | 2 | Data-Link | 1 | Physical | The Application layer provides services to software which requires a network. An example would be Internet browsers, and email. The Presentation layer handles data representation and code formatting. Data encryption and compression occur in this layer. The Session layer establishes, manages, and terminates sessions between applications. The Transport layer assembles data, transmits data segments, and disassembly before and after transmission. The Network layer is where routing occurs, this layer defines the process used to route data across a network. The Data-Link layer deals with the links and mechanisms used to move data on the network. This layer is divided into two sublayers the LLC and the MAC. The LLC sublayer controls frame synchronization, flow control and error checking. The MAC (Media Access Control) sublayer moves data packets to and from Network Interface Cards on a shared channel. The Physical layer deals with the physical characteristics of the transmission process...
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...TCP is to do with the messaging part and will make sure that all the devices are in agreement before the exchange is able to take place. To complete this you must firstly send your computer’s identification to the web server which the server will then acknowledge and send back its own identification. Your computer must acknowledge the identification of the web server otherwise they would not be able to communicate. This is done on layer 4 to make sure that the separate devices are able to communicate with one another. The second part of the protocol, IP, defines the way to address and route the packets to ensure that it will reach the correct location and not get lost on the way and go to someone else’s device. Every computer gateway will check the IP address and whether it matches the original IP. It will then decide whether to forward the message or not. One advantage of TCP/IP is the addressing. This because the TCP/IP assigns each device on the network with its own, unique IP address so it can always be identified which allows you to send information to a specific device easily. The implementation of an IP address is called IPv4 which is soon to be released by IPv6...
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...the subject of how OSI (Open Systems Interconnection) model and TCP/IP (Transmission Control Protocol/Internet Protocol) are similar and how they are different. There are 7 layers in the OSI model and there are only 4 layers in TCP/IP. The 7 layers in OSI are application, presentation, session, transport, network, data link, and physical with application being the highest and physical being the lowest of the model (Harney, n.d.). The 4 layers of TCP/IP are application, transport, internet, and subnet (Harney, n.d.). In the OSI model the application layer simply handles a lot of software protocols such as DNS, and HTTP. The presentation layer transfers data from one end to the other. The session layer handles connection between two devices. The transport layer makes sure information is formatted in the proper way. The network layer sends information over to the proper web address. The data link layer makes sure data is small enough to be sent across the network to arrive in the correct place. The physical layer deals with all hardware including NIC’s, hubs, and Ethernet cabling. The TCP/IP only has 4 layers because one or more layers of the OSI models is composed in the TCP/IP model (OSI Model vs. TCP/IP Model, n.d.). In the application layer it deals with the user and how data is handled with that user. The transport layer deals with communication. The internet layer establishes the best route of travel for information. The network access layer deals with hardware...
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... Expert Reference Series of White Papers The OSI Model: Understanding the Seven Layers of Computer Networks 1-800-COURSES www.globalknowledge.com Pg2Pg2 The OSI Model: Understanding the Seven Layers of Computer Networks Paul Simoneau, Global Knowledge Course Director, Network+, CCNA, CTP Introduction The Open Systems Interconnection (OSI) model is a reference tool for understanding data communications between any two networked systems. It divides the communications processes into seven layers. Each layer both performs specific functions to support the layers above it and offers services to the layers below it. The three lowest layers focus on passing traffic through the network to an end system. The top four layers come into play in the end system to complete the process. This white paper will provide you with an understanding of each of the seven layers, including their functions and their relationships to each other. This will provide you with an overview of the network process, which can then act as a framework for understanding the details of computer networking. Since the discussion of networking often includes talk of “?extra layers”?, this paper will address these unofficial layers as well. Finally, this paper will draw comparisons between the theoretical OSI model and the functional TCP/IP model. Although TCP/IP has been used...
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...500 WORD What is the OSI model the 7 layers The Open Systems Interconnection or (OSI model) “Is an architectural model that represents networking communication. It was introduced in 1978 by the International Organization for Standards to standardize the level of services and types of interactions for computers communicating over a network” (Emdad). The OSI is the standard that sets the path that data must travel through from one computer to another through a network. The OSI does this by the sending the through seven different layers almost like sending the data through checkpoints and at each checkpoint the data must be cleared so it is able to move on to the next stop. This is what the seven layers of OSI do. The data must go each layer, each layer performs a specific task in order to pass the data through to the next layer, and these layers also communicate to the layer above and below to make sure that everything in order. There are seven layers and each one has a specific function that prepares it for next layer the data must pass through all seven layers. The layers are separated into two sets the first is the application set • Application layer 7- This is the layer that provides the interface between the network protocol and the software running on the computer. This layer handles anything that communicates with the internet; this layer also handles any network related activity such as file transfers or reading and sending email. This layer is the closest one to...
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...Network Analysis of Patton-Fuller Community Hospital Patton-Fuller Community Hospital has been in existence since 1975, providing services ranging from basic medical care, outpatient, and pharmacy; to surgery, obstetrics, and physical therapy. The hospital’s mission is to provide a high quality standard of service and practice to the patients of the surrounding community. As with most health care facilities, heavy use of technology is needed in order to enact an efficient and stable operation with safe procedures. Information is needed almost immediately concerning patient files, and the need for keeping patient files up to date is an ever growing issue. Hospitals, doctor’s offices, urgent care clinics, and pharmacies all must implement technology and network strategies in order to stay current, practice safe procedures, and to stay ahead of the ever-changing rules and government regulations put on the health care industry. Patton-Fuller Community Hospital is no exception to this. Even though they are not a giant, metropolitan based, hospital with multiple locations, they are still a rather large operation with technology and network needs in relation to the industry participated in. Internal and External Data Transmission Hospitals, by nature must communicate data both internally and externally with precise accuracy and efficiency. Internal networks must transmit data to outside networks at other hospitals, pharmacies, doctor’s offices, and other health care...
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