Good Essays
Michael Rauseo IT310
OSI Model
In the early years of computer and network research and development many systems were designed by a number of companies. Although each system had its rights and were sold across the world, it became apparent as network usage grew, that it was difficult, to enable all of these systems to communicate with each other.
In the
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It determines which physical path the data takes, based on the network conditions, the priority of service, and other factors.
The network layer provides the following functions.
- Transferring the frame to a router if the network address of the destination does not indicate the network to which the station is attached
- Controlling subnet traffic to allow an intermediate system to instruct a sending station not to transmit its frame when the router’s buffer fills up. If the router is busy, the network layer can instruct the sending station to use an alternate destination station.
- Resolving the logical computer address with the physical network interface card address.
- Keeping an accounting record of frames forwarded to produce billing information

Transport Layer
The transport layer makes sure that messages are delivered in the order in which they were sent and that there is no loss or duplication. It removes the concern from the higher layer protocols about data transfer between the higher layer and its peers. The size and complexity of a transport protocol depends on
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