The OSI model
what is the OSI model and why is it important in understanding network - ✔✔*OSI model is a
concept way that is broken down into segments that discuss the complex process of sending data
over the network.
...
The OSI model
what is the OSI model and why is it important in understanding network - ✔✔*OSI model is a
concept way that is broken down into segments that discuss the complex process of sending data
over the network.
*understanding the model is important because its a widely used model that talks about network
communication.
what are the advantages of using a theoretical model to describe networking ? - ✔✔* it give a
common language and reference point for network professionals.
* It divides networking task into logical layers that are easy to understand.
* has different features at different levels
* Easier to troubleshooting
*promotes standards of interoperability (healthcare) networks and devices
what is the name Of layer 3 in the OSI model ? layer 5? - ✔✔*Layer 3 is called Network
* Layer 5 is called Session
which Osl model layers typically correspond to the network architecture? - ✔✔The physical
Layer
How does the session ID differ from the port number ? - ✔✔*Session ID keep data streams
separate.
* Port numbers identifies the process of where a network message should be forwarded on a
server.
At which OSI model layer would YOU find a frame? - ✔✔Data link layer (2)
what is the difference between connectionless and Connection-oriented services? -
✔✔Difference between Connection oriented service and Connectionless service
1.In connection oriented service authentication is needed while connectionless service does not
need any authentication.
2.Connection oriented protocol makes a connection and checks whether message is received or
not and sends again if an error occurs connectionless service protocol does not guarantees a
delivery.
3.Connection oriented service is more reliable than connectionless service.
4.Connection oriented service interface is stream based and connectionless is message based.
Limitation of OSI Model - ✔✔* The layer models are a concept and don't actually perform
functions
*some function do not spread across to other layers
* industry rarely have correspondence with the layers
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data link
1. Physical - ✔✔1. Physical
2. Data Link
3. Network
4.Transport
5.Session
6. Presentation
7.Application
Application (layer 7) - ✔✔combines network functionality into the host(device) OS and enable
network services.
Presentation(Layer 6) - ✔✔formats data into compatible form for receiving by the application
layer or the destination center
* This layer ensures formatting and translation of data between systems
* converting character sets to the correct format
* Enclose data into a message envelope by encry
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