OSI- Open System Interconnection Model.
OSI model is a conceptual and logical layout that defines network communication or we can say that for defining standards for connecting computers.
It was developed by ISO( International Organization for Standardization).
So there are seven layers in OSI model and these are...
7. Application layer
6. Presentation layer
5. Session layer
4. Transport layer
3. Network layer
2. Data link layer
1. physical layer
Layer 7: Application Layer
It is the top most layer in which the users interaction with the computer.
examples are: firefox, Internet explorer, operamini etc.
Layer 6: Presentation Layer
It is the layer in which the Operating System comes in work. Actually it works as a translator between the application and the network.
Layer 5: Session Layer
This layer estabilish, manage and terminate the session between communicating devices.
Layer 4: Transport Layer
This layer has the responsibility to transfer the data completely and ensure that there should not be any duplication of the data packet.
Layer 3: Network Layer
It determines the best path to move data from source to the destination based on the network conditions, the priority of service, and other factors.
This layer checks the IP address and works on the behalf of the IP address.
This layer contains the functionality of routers.
Layer 2: Data link Layer
This layer is responsible for the error-free transfer of data frames.
This layer contains the operation of Switches.
Layer 1: Physical Layer
This is the physical media and main functionality of the physical layer is to transmit the individual bits from one node to another node.
This layer contains the Patch pannel, Cabling etc.
No comments:
Post a Comment