Advantages and disadvantages of the OSI model
What are the advantages and disadvantages of the OSI model?
Software/Hardware used:
Software/Hardware used:
ASKED:
March 12, 2008 8:42 PM
UPDATED:
March 12, 2012 6:49 AM
Answer Wiki:
What? You will need to elaborate. There aren't pro and cons. It's a practical resource for looking at the data and how it flows. You should read about it.
Question
What are the advantages of the OSI model 7 network layers?
Importance of Network Layers
The standard model for networking protocols and distributed application is the OSI model -7 network layers.
The layers of OSI provides the levels of abstraction.
Each layer performs a different set of functions and the intent was to make each layer as independent as possible from all the others.
Each layer uses the information from the below layer and provides a service to the layer above.
[Main advantages of network layers]
Information hiding
Decoupling changes.
Breaks up complex problem into smaller manageable pieces
Abstraction of implementation details.
Separation of implementation and specification.
Can change implementation as long as service interface is maintained
Can use functionality
Upper layers can share lower layer functionality
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This question sounds like something from a homework assignment.
Networking protocols like the OSI ( Open Systems Interconnection) and the TCP/IP Reference Model are probably the best-known example of layered architectures.
Tanenbaum argues that the OSI model isn’t perfect :
* Some functions, such as addressing, flow control, and error control, reappear again and again in each layer. In order to be effective, error control must be done in the highest layer, so that repeating it over and over in each of the lower layers is often unnecessary and inefficient.
* Two of the layers (session and presentation) are nearly empty, whereas two other ones (data link and network) are overfull. In order to be effective the number of layers should be large enough that distinct functions need not be thrown together in the same layer out of necessity and small enough that the architecture does not become unwieldy.
While OSI is an important reference model, TCP/IP is the prevalent networking protocol