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1. Many LANs are powerful (high speed) and has low error rates, many applications do not
need the data integrity provided by OSI.
2. Many LAN applications need very fast setup with each other but the connection mode
transfer in OSI requires an agreement between 3 parties, users and the service provider,
hence it is slow.
3. The OSI model is too complex. The gap between the concrete use (implementation) and the
model is sometimes significant. Indeed, few programs can use or wrongly use the 7 layers of
the model: the session and presentation layers are hardly used and on contrary the data link
and network layers are often split into several sub-layers, since they are pretty complex. The
OSI model is in fact too complex to be effectively and properly implemented. The
committee that wrote the standard even had to leave aside some technical points, like
security and coding, so much it was delicate to preserve a well defined role to each layer
completed with these extra technical points. This model is also redundant (the flow control
and the error control appear in most layers). At the implementation level, TCP/IP is much
more optimized and effective.
4. OSI model is not adapted at all to telecommunication applications on computer. Some
choices are in disagreement with the way computers and software communicate. The
standard actually uses "system interruptions" to report events, and with high level
programming languages, that is not very realizable.
5. Due to the complexity of the model, the first implementations were pretty heavy and slow.
Conversely, the first implementation of TCP/IP in the Unix system of the Berkeley
University (BSD) was free and relatively effective. Historically, people thus had a natural
tendency to use TCP/IP.
What else can I help you with?
What is advantages of osi?
Answering "What are the advantages and disadvantages of OSI model?"
How do the layers of the OSI model correlate to the layers of the OSI model?
OSI
What are the top and bottom osi model layers called?
application -top of osi model physical- bottom of osi model
Which model came first osi model or tcpip?
Offcourse osi..... TCP/IP is an implementation of osi....
Which osi layer is application?
OSI stands for Open system interconnection model. Application layer is the seventh layer in OSI model.
You want to use the OSI reference model to troubleshoot a repeater Which OSI layer will you focus on?
Repeaters operate at the physical layer of the OSI model.
What is the physical layer of the OSI model designed to do?
hub work at physical layer of osi model
What is the Role of p2p in osi model?
p2p y osi
Which layer of the OSI model are layers capabale of functioning?
The OSI Model stands for Open Systems Interconnection. The answer to the question which layer of the OSI model are layers capable of functioning is at all layers.
Explain OSI reference model with revant diagram?
Explain OSI reference model with revant diag
IPX is used in layer of Novell Netware?
In the OSI reference model, that would be layer 3 (network).In the OSI reference model, that would be layer 3 (network).In the OSI reference model, that would be layer 3 (network).In the OSI reference model, that would be layer 3 (network).
Why Osi model is a model not a protocol?
because osi is open system interconnection that used to interact with open system
