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