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Osi and TCP

The document compares the OSI reference model and the TCP/IP reference model, noting that OSI is a generic standard with 7 layers that guarantees packet delivery while TCP/IP is a 4 layer model based on Internet protocols that does not guarantee delivery but is more reliable, and that OSI follows a vertical approach while TCP/IP follows a horizontal one.

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362 views2 pages

Osi and TCP

The document compares the OSI reference model and the TCP/IP reference model, noting that OSI is a generic standard with 7 layers that guarantees packet delivery while TCP/IP is a 4 layer model based on Internet protocols that does not guarantee delivery but is more reliable, and that OSI follows a vertical approach while TCP/IP follows a horizontal one.

Uploaded by

Dnyan navgare
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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ⓘ Optimized 42 minutes ago View original

http://www.studytonight.com/computer-networks/comparison-osi-tcp-model

COMPUTER NETWORKS
SEE THE INDEX

Comparison of OSI Reference Model and TCP/IP Reference


Model
Following are some major differences between OSI Reference Model and TCP/IP Reference Model, with
diagrammatic comparison below.

TCP/IP(Transmission Control Protocol / Internet


OSI(Open System Interconnection)
Protocol)
1. TCP/IP model is based on standard protocols around
1. OSI is a generic, protocol independent
which the Internet has developed. It is a communication
standard, acting as a communication gateway
protocol, which allows connection of hosts over a
between the network and end user.
network.
2. In TCP/IP model the transport layer does not
2. In OSI model the transport layer guarantees
guarantees delivery of packets. Still the TCP/IP model is
the delivery of packets.
more reliable.
3. Follows vertical approach. 3. Follows horizontal approach.
4. OSI model has a separate Presentation 4. TCP/IP does not have a separate Presentation layer or
layer and Session layer. Session layer.
5. OSI is a reference model around which the
5. TCP/IP model is, in a way implementation of the OSI
networks are built. Generally it is used as a
model.
guidance tool.
6. Network layer of OSI model provides both
6. The Network layer in TCP/IP model provides
connection oriented and connectionless
connectionless service.
service.
7. OSI model has a problem of fitting the
7. TCP/IP model does not fit any protocol
protocols into the model.
8. Protocols are hidden in OSI model and are
8. In TCP/IP replacing protocol is not easy.
easily replaced as the technology changes.
9. OSI model defines services, interfaces and
protocols very clearly and makes clear 9. In TCP/IP, services, interfaces and protocols are not
distinction between them. It is protocol clearly separated. It is also protocol dependent.
independent.
10. It has 7 layers 10. It has 4 layers

Diagrammatic Comparison between OSI Reference Model and TCP/IP Reference Model

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