COMPUTER NETWORKS :CHAPTER 3- Understanding the OSI model
Hello guys, here we are on chapter 3 0f computer networks.Sorry i was
out of town so i coudnt post , anyways in this post i will be
discussing about THE OSI MODEL.
some of you might have heard OSI model.Or you may have heard "this
is a layer 4 function or this layer deals with data packets etc etc".
Anyway its a model and it has layers , each of the layer do things.
m gonna walk you through what OSI model is and wats the concept behind
this and how it is usefull to us in this chapter and next few chapter .
LAYERS
Ok here is the mythical OSI model :
- Application
- Presentation
- Session
- Transport
- Network
- Data link
- Physical
FUNCTION :
suppose you building a house, you just dont get everything and try messing with it.
You have to do it in a ordered way or in phases, and you have specialized people , specialized
equipment to complete it,
in same way OSI model helps us to break down network functions , it helps to understand how network
works.
creates standard for equipment manufacturing.Like in physical layer we deal with hardwares,hubs,
switches,routers,cables.. so manufacturer have to concentrate on physical layer and works according to
standard, dont worry u will understand :)
LAYERS INDIVIDUALLY
- Application layer
Any application you use which communicate through ur network like browser , e-mail client or COUNTER STRIKE ..these
all application deals with application layer .
AS SOON AS it starts sending data it passes through presentation layer
- Presentation layer
with understands your request.
Also this layer has encryption services, more precisely generic encryption services.
then data get passed to session layer
- Session layer
thats all for today, will post tomorrow... and yeah stay tuned some really interesting (practicals) things to come and u gonna enjoy !!!
STEALTHBASTARD
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1 comments:
thanks for sharing your knowledge.
improve your writing style!
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