Hey guys I am back with my new post.Today i want to discuss with you difference about the between A Switch and A HUB.Although Physically they look similar to each other ,and do the same JOB , but practically they are different from each other.They are basically Core of the Network.
Normally, HUB's are Treated as a Dumb Device's whereas SWITCHES are having some brain power.
Initially we will discuss about HUB :
1.HUB is a splitter . It just splits the Ethernet signals to all the connected computer's.
2.In HUB's only one computer can talk with other computer at a time.
How it works :
Figure shown, is a hub,having Four ports.
Suppose computer at port 1 want to communicate with port 4, then what will hub do ??
In that case HUB, the Ethernet data will be received not only by port 4 computer but remaining computers at port 2 and port 3 also receives the same data.
That's why it is called as Splitter.
Generally these HUBS Detects the collision of Packets inside it.
Thus it consist of a Collision Detector.
Let us consider a case ,suppose computer at port 2 want to communicate with computer at port 3,in that case initially it sees any communication is going or not.If there is no communication,then packets will go to computer at port 3.
similar data will go to the remaining computer's also. Major drawback of it is ,it takes lots of Bandwidth.
If at the same time computer at port 4 want to communicate with computer at port 1 ,at that time packets collision will take place as shown in the figure.
As it is consist of collision detector,both computers at port 2 and port 4 hear the collision,and they will provide delay in sending the packets.
let, Computer at port 2 sends after 4 msec
Computer at port 4 sends after 9 msec.
But this delay is also a problem if number of devices increases.In this a case arises when all the devices talk at the same time ,which leads to more number of collision.So therefore whole Network will wait.
Thus this creates a whole mess,with HUB's.
SWITCHES:
In switch 50 computers can communicate at the same time,in case of HUB it will be mess.
How it works ??
Figure shown is a Switch having four ports.
suppose in a switch , if computer at Port 1 want to communicate with computer at port 4,then computer at 1 sends the packets ,it will go to all the ports including 2 and 3.But Computers at 2 and 3 say,It is not for us ,so they do not respond to it.
In switch ,Computer 1 come to know that it is at port 1 , and after packets being sent to port 4 computer(destination) ,it sends the acknowledgement to computer 1.
Next time when it sends the data , instead of sending to other computer it will directly send to computer 4.
This is because
1.Switch learns where all the computers are.
2.It creates a Road map.
Advantage of switches over HUB are :
Many computers can communicate at the same time,which is not possible in HUB.
Switches cares about MAC address of devices , to which it is communicating.With the help of MAC addresses it is able to find the destination of devices.
Last words :
Switches are better than HUB's in my opinion.Even now if you using HUB's, then just take that device and throw it in dustbin,because it is of no worth and Buy Good quality switch like of CISCO or VERIZON.As data transfer mainly depends on these devices,thus Using Switches will make transmission fast and less use of Bandwidth.
Also nowadays switches are available with two configurations those are , Managed and Unmanaged Switches.
UnManaged switches:
1.Everything is automatic.
2.We cant do any changes in the switch.
Managed switches:
We can change the configuration of switch and can make speed and Qos better .We can also change that into VLAN's.
IF YOU LIKE OUR POST AND WANNA SHARE ...
PLZ PROVIDE BACKLINK(TO MY POST) IN YOUR WEBSITE RATHER THAN ONLY COPYING...IT WILL BE A GIFT FOR OUR HARD WORK :)
That's it for today's post
Hope you enjoyed the post.
This is onethingtoknow.blogspot.com
Thanks for reading:).
3 comments
commentsI think, Switches are better than HUB's. HUB is a splitter. It just divides the Ethernet signals to all the linked PC's. Using switches will create transmitting quick and less use of bandwidth. Switches are available with both managed and unmanaged options. Managed switch indicates everything is automated and in unmanaged swith, we can easily modify the settings of switch such as speed, qos, etc. Market Research
Replyya bro , correct !:)
ReplyI am really happy to say it’s an interesting post to read. I learn new information from your article , you are doing a great job. Keep it up, Please visit my article Best photography tips
Reply