OSI Plane TripOSI Plane Trip

• Application Application - Bob in Chicago writes - Bob in Chicago writes a lettera letter

• PresentationPresentation - The assistant types - The assistant types the latter and makes it pretty the latter and makes it pretty ( translation)( translation)

• SessionSession - She then puts it in a - She then puts it in a special package A10 envelope with special package A10 envelope with the information of who from and who the information of who from and who toto

• TransportTransport - Then the letter is wrapped - Then the letter is wrapped in a fed ex with fed ex language of in a fed ex with fed ex language of where it needs to go only fed ex readswhere it needs to go only fed ex reads

• NetworkNetwork - Then it goes to FedEx - Then it goes to FedEx distribution center.distribution center.

• DataData - Then to the airport to the fed ex - Then to the airport to the fed ex roll-on container with airport code roll-on container with airport code ( MAC address)( MAC address)

• PhysicalPhysical - Then it is put on the delivery - Then it is put on the delivery system the plane. And flown to France system the plane. And flown to France where the reverse happens.where the reverse happens.

OSIOSI

• Application – 7- Responsible for Application – 7- Responsible for network services to applicationsnetwork services to applications

• Presentation-6- Transforms data Presentation-6- Transforms data formats to provide a standard formats to provide a standard interface for the application layerinterface for the application layer

• Session – 5- Establishes, manages , Session – 5- Establishes, manages , and terminates the connections and terminates the connections between the local and remote between the local and remote applicationsapplications

• Transport-4 – Provides reliable Transport-4 – Provides reliable transport and flow control across a transport and flow control across a networknetwork

• Network-3- Responsible for logical Network-3- Responsible for logical addressing and the domain of routingaddressing and the domain of routing

• Data link – 2 Provides physical Data link – 2 Provides physical addressing and media access addressing and media access proceduresprocedures

• Physical 1 – Defines all the electrical Physical 1 – Defines all the electrical and physical specifications for devices.and physical specifications for devices.