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EXPLANATION OF OSI 7 LAYERS WITH SIMPLE EXAMPLE.
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NETWORK: A network is a collection of computers, servers, mainframes, network devices, peripherals, or other devices connected to one another to allow the sharing of data.
INTERNET: Network of networks worldwide.
INTRANET: It is a private network within an organisation.
EXTRANET: It is extended version version of intranet with internet. It can be accesses by specific user like vendor, customer, suppliers etc. Outside the organisation.
There are the seven OSI layers. Each layer has different functions. A list of seven layers are given below:
Physical Layer
Data-Link Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application Layer