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Lecture_2_Notes.md

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UnderStanding Internet, Networks, Web & More

1. Network

⭐ What is Network?

  • Resources that are interconnected with each other on different scales are called network.

Let's take some examples to understand different types of scales:

Example: 1

  • Imagine this figure as home/house
  • Resources are interconnected in small scale like house this network is known as LAN (Local Area Network)

Example: 2

  • Let's take an other example as we using network some big scale.

Here we see they are connected in big scale across cities this network is called MAN (Metro Politan Network)

Example:3

  • We taking an example as using large scale of network.

Here we see that resources or devices are interconnected in such a large scale across countries is called WAN (Wide Area Network).

2. Internet

⭐ What is Internet?

  • Internet is a global system where billions of devices & other resources are interconnected with each other.

  • Internet is a Global System/ Network of Networks

3. WWW (World Wide Web)

⭐ What is WWW?

  • Interconnected documents & other resources you can access via Internet.
  • WWW is a subset of Internet.

Internet is a big entity, WWW takes place inside of this big entity.

4. IP Address

⭐ What is IP Address?

  • If your machines are connected with internet or exist in the internet, then that machine have some address to identify this is known as IP Address.

5. Browser

⭐ What is Browser?

  • Browser is a tool to access the data & other resources over internet like website, docs & web applications etc.

6. Browser Engine

⭐ What is Browser Engine?

  • Browser Engine is a brain of Browser that helps you to execute rendering process.

7. Client and Server

⭐ What is Client and Server?

  • Over the Internet two machines communicating with each other and they send a request to other machine for giving back a data in response.

Client & Server Modal

Types Of Clients:

  • Laptop, PC, Mobile
  • Browser
  • Application
  • CLI (Terminal)

Types of Server:

  • DB Server
  • File Server
  • Application Server
  • Web Server
  • Email Server

8. www.facebook.com/google.com

⭐ How www.facebook.com/google.com works?

  • Client requesting a www.facebook.com/google.com it changes to DNR(Domain NET Resolution) then it converts to IP Address then you will get a server from the IP Address then it makes a request in the server after processing it gives you a response in your client.