the osi modelstaff.du.edu.eg/upfilestaff/1058/101058_a1584253782__lab2._.pdf · the osi model helps...
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helps us understand the fundamentalsof network data transmission
by offering a guideline to the problem of sending data from one computer to another
The OSI model
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simple process of transferring a file
• Network data-transmission (like the file transfer) is
• performed through the use of a protocol suite
• A protocol suite is most easily defined as a set of rules used to determine how computers communicate with each other
• The OSI model is used to describe what tasks a protocol suite performs
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• the OSI model consists of seven layers.
• Each layer performs a specific function and then passes the result on to another layer.
The OSI model
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When a sending station has data to send, it formats a network request and then passes that request to the network protocol at the top layer,.
At the receiving station, the process happensin reverse.
simple process of transferring a file
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physical Layer Traffic Simulation
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Ip address
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Data link layer traffic simulation
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Client 192.168.1.2Web server 192.168.1.105
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Client 192.168.1.2Web server 192.168.1.30Dns server 192.168.1.105