Osi Layers

Satisfactory Essays
1. Complete the review questions: a. The seventh layer of the OSI model is the Application layer. b. Protocols in the Transport layer accept data from the Session layer and manage end-to-end delivery of data. c. True or False: The IP (Internet Protocol) operates in the Transport layer. False d. True or False: Standards help to ensure interoperability between software and hardware from different manufacturers. True e. True or False: Standards define maximum acceptable performance. False

OSI Layers | Description | Hardware | Protocols | How Built | Physical 7 | Provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects. | cables, cards and physical aspects | Fast Ethernet, RS232, and ATM | Last | Data Link 6 | Data packets are encoded and decoded into bits. | Bridges, Switches, Wireless access points, NICs, Modems, Cable Modems, DSL Modems, Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls | L2TP, PPP, PPTP, SLIP | 6th | Network 5 | This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. | Routers, Layer 3 Switches, Firewalls, Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls | ARP, ICMP, IGMP, IP, IPSec, RARP | 5th | Transport 4 | Provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. | Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls | TCP, UDP | 4th | Session 3 | establishes, manages and terminates connections between applications. | Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls | RTP, SIP | 3rd | Presentation 2 | Formats and encrypts data to be sent across a network, providing freedom from compatibility problems. | Gateways, Proxy Servers, Application Switches, Content Filtering



References: http://www.sans.org/reading_room/whitepapers/standards/osi-model-overview_543

You May Also Find These Documents Helpful

  • Good Essays

    Osi Layers

    • 597 Words
    • 3 Pages

    The OSI model has seven layers, with each having different types of security responsibilities. The seven layers are application, presentation, session, transport, network, datalink and physical with control being passed down from layer to layer starting with application. The biggest threat to these layers is through people, sometimes known as the 8th layer of the OSI model. Companies should take the time to educate their employees on the security threats that each individual brings to the company…

    • 597 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Osi & Security Layers

    • 495 Words
    • 2 Pages

    Reginald Monroe-@02516632 Summary of OSI layers & Security OSI stands for Open Systems Interconnection and it was developed by the Europeans in the 1980’s. OSI is divided into two major fields, an abstract model of networking and a set of defined protocols. The seven layers of the OSI basic reference model are listed and defined below (from bottom to top): 1. The Physical Layer – this layer describes the physical components of the various communications media, it also includes the electrical…

    • 495 Words
    • 2 Pages
    Satisfactory Essays
  • Best Essays

    A Glance at the Session Layer of the OSI Model Throughout the history of networking, one model has stood the test of time for providing not only insight, but also a foundation by which all networking systems utilize in some form or fashion. The seven layers of the OSI model, which stands for Open System Interconnect, are: Application, Presentation, Session, Transport, Network, Data link, and Physical. These layers are the framework for networking, because they represent the roadmap, rules, and…

    • 1514 Words
    • 7 Pages
    Best Essays
  • Good Essays

    The 7 Layers of the OSI Model Last updated: March 03, 2008 The OSI, or Open System Interconnection, model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next, starting at the application layer in one station and proceeding to the bottom layer, over the channel to the next station and back up the hierarchy. |Application |This layer supports application and end-user processes. Communication partners…

    • 500 Words
    • 2 Pages
    Good Essays
  • Good Essays

    7 Layers of the Osi Model

    • 767 Words
    • 4 Pages

    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…

    • 767 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Network Security at OSI Layers Muhammad Muzammil Syed Zeeshan Nasir Department of computer science FUUAST, Islamabad 1-OSI Model: In 1983, the International Organization for Standardization (ISO) and the International Telegraph and Telephone Consultative Committee (CCITT) merged documents and developed the OSI model, which is based on a specific hierarchy where each layer builds on the output of each adjacent layer. The OSI model is a protocol stack where the lower layers deal primarily…

    • 7615 Words
    • 31 Pages
    Good Essays
  • Satisfactory Essays

    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, Transport, Network, Data-Link, and Physical Layers. As a result it is frequently…

    • 382 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Checkpoint: OSI Model Paul Tegner IT/242 April 22, 2011 Mark Burke OSI Model The OSI Model consists of seven layers. These layers are the application layer, presentation layer, session layer, transport layer, network layer, data link layer, and physical layer. The Application Layer The application layer is responsible for interaction between the operating system and the network services and provides an interface to the system. It provides the user interface to a range…

    • 426 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    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…

    • 28210 Words
    • 113 Pages
    Powerful Essays
  • Good Essays

    OSI Model Quiz Result Scrolldown to review your answer and view your score. Passing grade is 70% = C. ------------------------------------------------- Top of FormBottom of Form | 1) Routers operate at which layer of the OSI model? | a) physical | b) transport | c) network - correct answer | d) MAC sublayer of the data link layer | | 2) Bits are packaged into frames at which layer of the OSI model? | a) data link - correct answer | b)…

    • 5270 Words
    • 22 Pages
    Good Essays