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
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
• 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
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
physical Layer Traffic Simulation
Ip address
Data link layer traffic simulation
Client 192.168.1.2Web server 192.168.1.105
Client 192.168.1.2Web server 192.168.1.30Dns server 192.168.1.105