Skip to main content

computer Networking- CCNA part 7 of Segment 1- Physical Layer of OSI Model

OSI Model - Physical Layer 

Hello Friends i am Vasu Birla and today i will discuss about first Layer of OSI model ,, Physical Layer.

Physical Layer   is the layer where actual data moves physically across the networks interfaces or components.  
Physical layer specify standards about physical cables, devices and connecters. Some Important functions of physcial layer are:- 

Transmission Media -  Which kind of medium used to transmit data it is wired or wireless and which kind of cables and connecters are used  , and how data are sent one devices to other with wired or wireless midium these all are comes under physical layer. (We will discuss in details about every transmission medium)
 
Transmission mediums

Encoding & Signaling - Physical layer is also responsible for encoding and Signaling function. for exam those data are in form of bits or 0 and 1 form  so how these data can be sent to other devices and  what voltage levels should be for sending data in form of Signals , These all functions are done in the physical layer.
Encoding and signaling

Topology - topology means design of network , how our network look physically or how devices are connected physically , this is also term of physical layer. 

topologies

Devices-  Physical layer technology deals with 0 and 1 , the most common physical devises are used on this layer is  Hub, Repeater and switches.

Here Hub and Systems are physical layer devices 


 In the next part we will discuss Data link layer ,,,,,,  hare krishna 




#ccna #cisco  #Networking 
Location Detected  

Sanawad Coordinates
22.1800° N, 76.0700° E
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 Kill the Process: ( Port Process )

If you are seeing a Error like  -   Error: listen EADDRINUSE: address already in use :::3000   then you can easily kill it by running these commands  Find the Process Using Port 3006 : On Windows   netstat -ano | findstr :3000 On Linux/macOS lsof -i :3000       Terminate the Process :       On Windows taskkill /PID <PID> /F    means       taskkill /PID 17780 /F On Linux/macOS kill -9 <PID>     means kill -9 17780                ==============END ==========  
Post a Comment
Read more