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The International Standard Organization holds a precise model for Communication Systems which is called as Open System Interconnection or the OSI Model. This layered model is a conceptualized view of how one system communicates with the other by using various protocols defined in each layer. Additionally, each layer will be designated to a well-defined part of communication system. For example, the Physical layer will define all the components of physical nature, i.e. wires, frequencies, pulse codes, voltage transmission etc. of a communication system.
The OSI Model has seven layers as shown below:
Network layer will be responsible to carry data from one host to another. It offers a way to allocate logical addresses to hosts and identifies them uniquely using the same. Network layer will take data units from Transport Layer and cuts them in to smaller unit called Data Packet.
Network layer will define the data path which the packets should follow for reaching the destination. Routers will work on this layer and provide mechanism for routing data to its destination.
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Internet Protocol version 4 (IPv4) Related Tutorials |
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Internet Protocol version 4 (IPv4) Related Practice Tests |
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