Open Systems Interconnection ModelComputer Networking<br />Jake Soderberg and Holly Longen<br />Dunwoody College of Techno...
Open Systems Interconnection (OSI) Model<br />Layer 7: Application Layer<br />  Layer 6: Presentation Layer<br />    Layer...
OSI Model Layer 7: Application Layer<br />Interacts with software applications<br />Functions typically include identifyin...
OSI Model Layer 6: Presentation Layer<br />Receives requests for files from the Application layer and presents the request...
OSI Model Layer 5: Session Layer<br />Responsible for establishing and maintaining a session between networked stations or...
OSI Model Layer 4: Transport Layer<br />Responsible for error checking and requests retransmission if an error is found<br...
OSI Model Layer 3: Networking Layer<br />Responsible for dividing a block of data into segments (packets) small enough to ...
OSI Model Layer 2: Data Link Layer<br />Responsible for receiving packets from the network layer and passing them to the p...
OSI Model Layer 1: Physical Layer<br />Responsible for passing data packets on the cabling, data can be transferred by ele...
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Jake Soderberg | OSI Model Presentation | Dunwoody College

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

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