What is ISO-OSI reference model? Why TCP/IP model is more popular than OSl model? Which layer OSl is used for
the following :-
- To route packets;
- To convert packet to frame;
- To detect and correct errors;
- To run services like DNS, FTP, Telnet etc.
Set: 1.(c) Marks: 4 Year: 2017
ISO stands for International organization of Standardization. This is called a model for Open System Interconnection (OSI) and is commonly known as OSI model. The ISO-OSI model is a seven layer architecture. It defines seven layers or levels in a complete communication system.
Both models are equivalent. OSI is a reference model just used for study purpose and TCP/IP is an implemented model in every digital device nowadays.
IN TCP/IP model some layers of OSI model is combined e.x application + presentation + session = Applicatilon/ process Layer
Network layer is used to route packets
Data Link Layer is responsible to convert packet to frame.
Application layer is responsible to run services DNS, FTP, Telenet etc.