Jake Soderberg | OSI Model Presentation | Dunwoody College
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Jake Soderberg - OSI Model Presentation - Dunwoody College of Technology

Jake Soderberg - OSI Model Presentation - Dunwoody College of Technology
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Jake Soderberg | OSI Model Presentation | Dunwoody College Jake Soderberg | OSI Model Presentation | Dunwoody College Presentation Transcript

  • Open Systems Interconnection ModelComputer Networking
    Jake Soderberg and Holly Longen
    Dunwoody College of Technology
    Computer Networking CWEB 125
    Winter Quarter 2010
    click to visit my website Jake-Soderberg
  • Open Systems Interconnection (OSI) Model
    Layer 7: Application Layer
    Layer 6: Presentation Layer
    Layer 5: Session Layer
    Layer 4: Transport Layer
    Layer 3: Networking Layer
    Layer 2: Data Link Layer
    Layer 1: Physical Layer
    2
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 7: Application Layer
    Interacts with software applications
    Functions typically include identifying communication partners, determining resource availability, and synchronizing communication
    Managed by operating system
    3
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 6: Presentation Layer
    Receives requests for files from the Application layer and presents the requests to the Session layer
    Reformats, compresses, or encrypts data when necessary
    Managed by operating system
    4
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 5: Session Layer
    Responsible for establishing and maintaining a session between networked stations or hosts
    Half Duplex, Simplex, Full Duplex
    Session layer is managed by the operating system
    5
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 4: Transport Layer
    Responsible for error checking and requests retransmission if an error is found
    Error checking uses TCP (three-way handshake, guaranteed delivery) or UDP (unguaranteed delivery)
    Transport layer is managed by the operating system
    6
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 3: Networking Layer
    Responsible for dividing a block of data into segments (packets) small enough to travel over a network
    Networking layer is also responsible for finding the best possible route to send the data packets over a network (routing)
    On the internet, it is managed by IP (Internet Protocol), which divides data into packets small enough to travel over a TCP/IP network
    Networking layer is managed by the operating system
    7
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 2: Data Link Layer
    Responsible for receiving packets from the network layer and passing them to the physical layer for transport, or the reverse by taking packets from the physical layer and preparing them for the networking layer
    If the packets are too large for the physical layer, the data link layer splits the packets up and they are reconstructed on the receiving end
    Switches and bridges function at the data link layer of the OSI model
    Data link layer is managed by the NIC
    8
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com
  • OSI Model Layer 1: Physical Layer
    Responsible for passing data packets on the cabling, data can be transferred by electrical pulses, radio frequencies, or infrared light
    Ethernet cabling, token ring network technology, SCSI, hubs and repeaters all function at the physical layer of the OSI model
    Physical layer is managed by the NIC
    9
    Computer Networking | Dunwoody College connect with me at www.jakesoderberg.com