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Lecture 2 (OSI Model (4 - Transport (ensures that messages are delivered…
Lecture 2
4 - Transport
ensures that messages are delivered error-free, in sequence, and with no losses or duplication
TCP/SPX/UDP - Host to Host, Flow Control
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5 - Session
allows session establishment, maintenance and termination between processes running on different stations
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Perform security, name recognition, logging, etc.
3 - Network
controls the operations of the subnet, deciding which physical path the data takes
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7 - Application
serves as the window for users and application process to access the network services - End User Layer
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OSI Model
Layers 1,2, & 3 are the network support layers
Layers 5, 6, & 7 are the user support layers
Layer 4, the transport layer, links the two subgroups
