Introduction to Networking

 In this course, we will cover Networking for Hacking from scratch to an advanced level. As Networking is the main aspect of Hacking.

So, let's start the course... 

#What is Network??

    A network is consist of two or more devices that are linked to each other to share resources.

#Let's understand some Terminologies:

1. Computer Network: A collection of computers that are connected to each other in various ways to communicate and share resources with each other with the help of the Internet.

NOTE: The generic term Node or Host refers to any devices that are connected to each other on the Internet.

2. Data Transfer Rate: The speed with which data is moved from one place of the network to another.

#Types of Network Model??

    In Networking, we have 2 models:

    1. Peer-to-Peer Model

    2. Client-Server Model

NOTE: The most important/ most used network is the client-server model network.

But don't worry, I'll give you the example of a Peer-to-Peer network as well.

The Best example for Peer-to-Peer networks will be "Blockchain".

• Blockchain is a De-centralized, group of a growing list of records called Blocks. And connected together using Cryptography.
• Blockchain is a Peer-to-Peer network-based technology.
• Peer-to-Peer means one node or device is connected to two or more two devices. The devices can be unlimited.

Now, Let's continue the Client-Server Model...

It is the simplest model that we are using on the internet.

For Example: If you have any query, you asked the query from Google or any other Internet Browser. In that scenario, you are a client and you asked for a Request.

In reply, Google answers your query or sends you the Response regarding your query. In that scenario, Google is the server, which means that Google is providing service.

#Types of Server:

1. File Server: A computer that stores and manages files for multiple users on a network.

• A server that is physical and maintained physically.

2. Web Server: A computer dedicated to responding to requests(from the browser client) for web pages.

• A virtual server. Example: Google Cloud, Microsoft Azure, AWS, etc. 

#Types of Network:

1. Local-Area Network(LAN): A network that connects a relatively small number of machines in a relatively close geographical area.

• Can also be called Intranet Network.
• Only insiders can access it.
• For Example, Your college computers, are connected to each other and can be accessed on the given premises. OR Your home router is either wired or wireless. It is also a local-area network.

NOTE: In the case of wireless, we say W-LAN.

Now, Inside LAN we have some Topologies.

#What is Topology: Simply we can say that, a pattern via which devices are connected to each other in a given premise.

#Types of Topologies: 

a) Ring Topology: A configuration that connects all nodes in a closed-loop on which messages travel in one direction.

b) Star Topology: A configuration that centers around one node to which all others are connected and through which all messages are sent.

c) Bus Topology: All nodes are connected to a single communication line that carries messages in both directions.

2. Wide-Area Network(WAN): A network that connects two or more local-area networks over a potentially large geographical distance. 

• Often one particular node on a LAN is set up to serve as a "gateway" to handle all communication going between LAN and other networks.
• Communication between networks is called Internetworking.
• The Internet, as we know it today, is essentially the ultimate wide-area network, spamming the entire globe.

3. Metropolitan-Area Network(MAN): The communication infrastructure that has been developed in and around large cities.

• For Example Connection of a railway system say(Metro) in one city.

NOTE: LAN > MAN > WAN

Thanks 

Regards

Previous Articles:

#Networking For Hacking:

1. Introduction to Networking 

2. Networking Devices

3. Transmission Media(Guided and Unguided)

4. Switching in Networking

5. OSI Model

6. OSI Model - Part 2

7. Functions of OSI Layers

8. TCP/IP Model

9. OSI vs TCP/IP

10. Internet Protocol(IP)

11. Internet Protocol Versions | Internet Versions Explained

#Linux for Absolute Beginners:

1. Introduction of New Blog

2. More on Linux

3. Installation

4. Linux Commands - Part 1

5. Linux Commands - Part 2

6. Linux Commands - Part 3

7. Linux Commands - Part 4

8. Linux Commands - Part 5

9. All Files & Directories Commands

10. File Editor & Manipulating Data Commands

11. All Programming Languages Commands

#Penetration Testing Tutorial for Absolute Beginners

1. Introduction to Penetration Testing

2. What is N-Map?

#Technical Tools Explanation

1. Log4J Tutorial

#Linux for Absolute Beginners in Hindi

1. Introduction of New Blog in Hindi