Backpackers Tokyo

Ayush Verma

Day1 : Installing Kali Linux

Day 2: Navigating Linux

Day3: Computer Networking

Github: 100DaysofHacking

Hello Everyone, This is Ayush if you haven’t read the previous blog then please read it by clicking on above link in which we have discussed important concepts which is necessary for further blogs.

Now today in this blog we are gonna talk about some other networking concepts like Types of network, subnetting etc so let’s start.

Types of Network:

  1. LAN: LAN stands for Local Area Network which is most common in the networking as it covers small areas like our home network, office network or any coffee shop you can say. Suppose you are in a Compute Lab and your PC is connected through a physical cable called RJ45 Cable and you’re accessing internet so here is a LAN connection .

2. MAN: MAN stands for Metropolitan Area Network which covers more area than LAN and also MAN is usually formed using a number of different LANs.

3. W AN: WAN stands for Wide Area Network which covers area greater than both LAN and MAN, means it connects one city to other or one country to other.

Now I hope it’s clear now let’s talk about different LAN Network Topologies. But first we’ll discuss what is topology.

Network Topology:

Network topology basically means how the network is structured or how every device should be connected with each other or also we can say how network is arranged for communication between sender and receiver.

Types of Network Topology:

Here basically we’ll talk about types of LAN Topology, how LAN Network can be arranged in different ways.

Star Topology: In star topology every device is connected with a central network device, it may be switch or hub. In this topology every information is sent through central networking device.

In this one disadvantage is , suppose central network device gets failed then communication between devices will stop .

Simulation:

In the above video you can see all 4 PCs are connected to a switch (a networking device will discuss further) and PC1 is sending some data to PC3.

Now moving further will talk about bus topology.

Bus Topology: In Bus Topology , every device is connected through a single cable , and all the communication takes place through that single cable, and that cable is called the backbone of bus topology.

In bus topology , if cable breaks then connection between all devices will stop and also bus topology can not handle data if any one computer generate huge amount of data.

Simulation:

In the above video you can see PC0 is sending data through different switch to PC3.

Ring Topology: In ring topology all devices are connected with each other like a ring in circular form and every device is connected to atleast two nodes or PCs.

In a ring network, packets of data travel from one device to the next until they reach their destination. Most ring topologies allow packets to travel only in one direction, called a unidirectional ring network. Others permit data to move in either direction, called bidirectional.

The major disadvantage of a ring topology is that if any individual connection in the ring is broken, the entire network is affected.

Simulation:

In the above video you can see all the PCs are connected through each in ring form with the help of switch and pc1 is sending data to pc2 with the help of switch.

Now I hope these 43 topologies are clear to you, now moving forward let’s talk about different networking devices , switch and hub.

Networking Devices:

Switch: Now above you can see everywhere I have used switch to transmit data from one PC to another. So , now we’ll see in more detail about it.

Switch is a networking device which is used to transmit data exactly to given destination, based on the MAC address of device. Switches keep track of what device is connected to which port that’s why instead of sending data/packet to all connecting PCs , it sends data to particular device.

Router: Router is also a networking device which connects two networks like two LANs.

Simulation:

In the above video you can see , how packet is being sent from one network to other.

Now our next part is subnetting , it basically means dividing a network in different parts, Let’s take the typical café on the street. This cafe will have two networks:

  1. One for employees, cash registers, and other devices for the facility
  2. One for the general public to use as a hotspot

Here one network is divided into two parts. We’ll see it in more detail in our next blog.

I hope you are enjoying this 100DaysofHackingChalleng, if yes then please write a review and ya in starting you should have good understanding of networking that’s why I’m writing more about network n all soon we’ll start blogs on cybersecurity.

So Thank You for reading will meet in next blog if you have any queries please ask me on instagram.