Question

why the OSI model is important?

and compare between TCP/IP and OSI model?

Answer 1

OSI model or Open system |Interconection is a networking model which describes how information is transferred from one networking component to another.The whole communication process in a network is basically divided into 7 layers of OSI layer which follows differentset of protocolsto send and receive messages between nodes in a network.

OSI was develpoed by ISO to facilitate transfer of information between two nodes of different vendors whoch is basically known as vendor neutral netwrok model

The 7 layers of OSI model are as follows:

1. Application Layer

2.Presentation Layer

3.Session Layer

4. Transport layer

5. Network Layer

6. Data link layer

7.Physical Layer

Difference between TCP/Ip and OSI model are as follows:

1.Basically OSI modelis composed of 7 layers whereas TCP/Ip model is composed of 4 layers which areas follows:

    1. Application layer

    2.Transport layer

    3. Internet Layer

    4.Netweok access layer

2,TCP/Ip mdelis generally based on the standard protocols on which actually the INternet works whereas OSI model is a generic protocol which allows communication between the network and end user butthe former allows the hosts to communicate over a network.

3.OSI odel basically acts as a guidance tool over which the networks works while TCP/IP model is the implementation of the OSI model

4.OSI model baically follows vertical approac but TCP/IP model followshorizontal approach

5.Transport layer is connection oriented in OSI model while Transport layer is both connection oriented an connectionless in TCP/Ip model.