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