Skip to main content

computer Networking- CCNA part 6 of Segment 1- OSI Model

OSI Model  (Open System interconnection)
Hii , i am Vasu Birla and today we discuss about OSI Model, a very popular term often used in the Networking. So  What is OSI model and why it is needed 
So pahle History pad lete he ,,,
History of Osi -   In the 1977, ISO (International Standard Organization) made a committee for Develop a Open standard for Interconnection between the all kind of electronic devices  after that Later in 1984 ISO's committee introduce a OSI model ( Open System Interconnection Model).

What does mean by OPEN   - In OSI (Open system interconnection ),,, Here Open means ,, whomever follow this Model  means  vendors , Manufactures (IBM,apple,Microsoft, Intel)   jo bhi ho ,, if they follow this model for manufacture computer systems so, Those devices, systems can communicate to each other  whether that are from same vendor or from different Manufacturer . ( matlab yadi ye companies OSI ko follow karke apne systems banate he to wo aapas me internet se connect ho sakte he chahe phir wo dusri company ke kyu na ho. )

Before OSI  each Company or Vendor has their own specific model  but they can communicate with the same vendor's device   for example IBM  before OSI  IBM was used to follow their own specific Networking Model  so only IBM's device could communicate to each other  that was a big limitation of IT world .  but the Solution was found that is OSI model.  But Today it is not used  but Osi model is very good to understand that how Internet works.

Note -   OSI model is not exist physically , It is not Hardware or Software ,, It is just protocols  and Logical Model to Understand the Working of Internet. 

There are 7 Layers in OSI model for Understanding the working of Networks.  It is Count from bottom to Up  it means Physical Layer is Layer 1 , and Application Layer is Layer 7. 
  • First 3 Layer means Physical, Data link , and Network layer are known as Media Layer 
  • Layer 4 to Layer 7 Transpor, Session , Presentation and Application layers are known as Host Layer.
  • Each Layer has their own function and Responsibility.
OSI Model
 We will discuss each Layer in details in next parts ,,,,,   have a good time ,,,, Hare krishna ,,, 

 

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

Part 15- What is Repeater (Networking Devices)- Computer Networking- CCNA

Repeater  hello friends i am Vasu Birla and today i am starting new segment of CCNA computer networking  its a Networking Devices. we will discuss every important Devices used in networks. Repeater is a first networking devices. What is Repeater  Repeater is a device that receives signals and re-transmits by amplifying or regenerating signals. Repeater has two port one is for receive signals from previous network and second port is for retransmit signals to the next extended network. Two Port Repeater Repeater is a device which is used to Regenerate or replicate signal (Pichhe se aa rahe signal ko regenerate karke ya amplify karke aage strong signals bhej sakte he) Analog and digital both type of signals can be retransmitted by repeater. Here there is difference between regeneration and amplifying.  Amplification means , received signals will be amplified as it is , whether there are impurities in signals  and Regeneration means repeate...
Post a Comment
Read more

GitHub Repo Collaboration Work on single project

 =============================================== To collaborate effectively with your friend on the same project, you should use Git branches to manage different lines of development. Here's a step-by-step procedure you can follow to streamline collaboration: 1. Create Separate Branches for Each Developer Create a New Branch for Your Friend: On your local repository, create a new branch for your friend. For example if your friend name is kilvish , if you want to create a branch named kilvish , you would run: make sure you would be on main branch already   command->  git checkout -b kilvish git push origin kilvish 2. Set Up Your Friend’s Environment( On your Friend's System )  at kilvish side  run ->  Clone the Repository (if not already done): If your friend hasn’t cloned the repository yet, they should do so: command ->  git clone https://github.com/Vasu-Birla/your-repo.git   // your your main clone line  Fetch All Bran...
Post a Comment
Read more

How to deploy NodeJS app on server with Apache2 and acess it with Server IP addresss - Node JS deploy project Live.

     hello friens , This is Vasu Birla , in previous post we have seen the deployement of NodeJS app on AWS instance server instance but AWS server is expensive than other servers . SO today we will use simple Ubuntu server for making Live out Project using Apache2 . At the end you will be abe to access your NodeJS app using server IP address from anywhere  .. 1.  Login to your server using SSH terminal . (in AWS part i already explained how to do this )     -> Open your putty in hostname put your server IP -      login with ssh username ->root and password     (if you dont have root username and pass ask your      provider or reset it from cpanel or hosting panel ) 2. after login - on terminal you can Put your project anywhere.     There are two ways to put your project folder on server location     (i) - > using Github - (very popular and easy to track your everyday code changes t...
Post a Comment
Read more