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Computer Networking- CCNA part 13 of Segment 1- Presentation Layer of OSI Model

Presentation Layer 

Hello friends , i am vasu birla and today will talk about 6th layer of OSI model. Note this these layers are not software or hardware, it is just for understanding and logical theory of understanding of working of network.

We can understand this layer by it's name Presentation  means to present something.

When any system sends data to another system so it may be that second system would not present the same data as given by sender system. Presentation layer make data viewable according to recieving system.  
For more easy understanding lets look some functions of this layer-



Translation -  There are different kind of platforms in the network (windows, linux, mac etc) these systems are different so way of presentation of  data is also different. for this problem presentation layer Translate the data from original form to viewable form of recieving system.

for example if you open any website on Windows OS  like www.vasubirla.blogspot.com  so you will show some pages  when you open this website on Linux  or MAC os  so same view or same color pages will be shown to you , It is only because of presentation layer. 

Encryption -  It means simple plan data converted in to coding form. at this layer SSH protocol (Secure Socket Layer)  is used for encryption so that no hacker or unwanted activity read our data.

Compression - It means reduce the size of data , it is important function through which data is sent in small size for resulting good speed and utilizing time.

 


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