Hub Switch Router || Network Devices || Difference between hub switch and router

Hub Switch Router

In Previous posts we learn what is Computer Network and how it works, how data transmitted throw medium. 
Now in this post we will learn “How to Create Computer Network” . So there are basically 3 devices that are used to create Computer Network called Hub Switch Router.
Let’s take them one by one-

1. Hub

When we want to connect two or more computers together so we have to use a device called Hub.
All the computers connect to hub at ports. 
A message is sent from one computer to other is travel from one port to other.
Suppose there are five Computers connected together.
Hub, Network Device
Hub
If computer A want to send a message to Computer D then due to Hub property that message will deliver to all the Computers with D.Hence all computer can see the message. So this is a major drawback of Hub.

2. Switch

Switch is same as Hub but it is intelligent to Hub. Because it is able to handle data and knows the address of all Computers connected to it.
So when any Computer want to send data to any other Computer then Switch firstly check the address of Computer from address list and then send message to target Computer.
Switch, Network Device, Hub vs Switch
Switch
Suppose in our case Computer A want to send a message to Computer D switch directly send message to Computer D and no other Computer will receive any data.so it reduce traffic too.
Hub is a device that allows to connect multiple PCs to a single Network. Whereas Switch can connect various devices such as PCs and Hub too.

3. Router

A Router is used to connect two or more Networks.Generally Router is used to connect LAN and Internet. Router uses special technique to find best path to forward packets.
For this it uses ICMP (Internet Control Message Protocol).
 
Following picture shows how Hub Switch Router play roll in Network. 
Router, Network Device
Use of Hub Switch Router

At last we can say Hub and Switch are used to Create a Network and Router is used to connect Networks.

For more detail You can see video on Hub, Switch and Router.



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