CN : U-1: Comparison of OSI and TCP/IP Reference Models (TCP/IP(Transmissi…
CN : U-1: Comparison of OSI and TCP/IP Reference Models
OSI(Open System Interconnection)
OSI is a generic, protocol independent standard, acting as a communication gateway between the network and end user.network.
In OSI model the transport layer guarantees the delivery of packets.reliable.
Follows vertical approach.
OSI model has a separate Presentation layer and Session layer.layer.
Transport Layer is Connection Oriented.
Network Layer is both Connection Oriented and Connection
OSI is a reference model around which the networks are built. Generally it is used as a guidance tool.
Network layer of OSI model provides both connection oriented and connectionless service.
OSI model has a problem of fitting the protocols into the model.
Protocols are hidden in OSI model and are easily replaced as the technology changes.
OSI model defines services, interfaces and protocols very clearly and makes clear distinction between them. It is protocol independent.
It has 7 layers
TCP/IP(Transmission Control Protocol / Internet Protocol)
TCP/IP model is based on standard protocols around which the Internet has developed. It is a communication protocol, which allows connection of hosts over a network.
In TCP/IP model the transport layer does not guarantees delivery of packets. Still the TCP/IP model is more reliable.
Follows horizontal approach.
TCP/IP does not have a separate Presentation layer or Session layer.
Transport Layer is both Connection Oriented and Connection less.
Network Layer is Connection less.
TCP/IP model is, in a way implementation of the OSI model.
The Network layer in TCP/IP model provides connectionless service.
TCP/IP model does not fit any protocol
In TCP/IP replacing protocol is not easy.
In TCP/IP, services, interfaces and protocols are not clearly separated. It is also protocol dependent.
It has 4 layers
Prepared by: Srinivas Adapa
, Associate Professor, CITM ; Content Source: