OK, so in the last lecture we saw that switches earlier to devices, which means this segment, the
network within the Mac addresses.
Now, if you see the familiar three switch, that means you're referring about the router and not a
layer to switch off.
Sometimes routers are also called as layer three switches, so don't get confused between them.
The term router and the layer three switch are interchangeable.
Now, what is a router router is a network device used to connect many sometimes disparate network segments
together, combining them into what we call the in the network that is the Internet that you are using
today.
Oh, well, configured router can make intelligent decisions about the best way to get network data
to its destination, so it gathers the information it needs to make these decisions based on the network's
particular performance data.
Another important thing is routers use IP addresses to make the forwarding decisions.
They're considered as layer three devices because IP addresses are used at least three and Mac addresses
are used at to now on the screen again.
So.
On the screen, you can see a Cisco router, which is a typical device which is used to connect to the
Internet.
Now.
Rorters can be Multiphasic devices to behave like computers and to themselves with their own complex
operating systems.
For example, Cisco does have their own operating system.
Who can even think of them as sleep users are totally dedicated to the process of routing packets.
And due to their complexity and flexibility, you can configure them to actually perform the functions
of other types of network devices.
Now, rorters can have many different names in the beginning of this lecture, I have told you that
Routley also known as alertly switch, or it is also known as a multilayer switch.
Remember, if you hear the word switch, it means little to do.
It's OK if you just hear the word switch, it means later to reverse routers.
Layer three switches and molecular switches mean the same.
Now, as you can see on the screen, there is a router which is held to connect to different network
segments and make use of the laser pointer here.
Yeah, so this is a router which is used to connect this network and this network.
So if Bc5 if this PC, OK.
Now, if this PC wants to transfer the data to, let's say, PC three.
So how will it go?
It will transfer the data to this packet.
Now, this is a hub and we have seen that hub transports data to all other PCs.
This data will for will be forwarded to this all the pieces, and then it will also forward to this
PC as well.
And after this, the hub sends the data to router router checks if this data is present for which Internet
work.
So as the intended data is four out of five I'm sorry, PC three of the other segment that out properly
routing data to the switch.
Now on the switch there is a packet and in that packet it is the time that it is for PC five.
OK, it is four, PC five.
So now this switch now we all know that switch does not broadcast the packet to all other hosts.
It simply transfers this packet to PC five.
So in this way, the networking device Bc5 of segment one.
This is the first segment.
And this is the second segment, so pick one.
P.S., five of four segments will transfer data to ABC three now in this diagram explaining we understood
the concepts of hub and switch.
So I hope you are now comfortable with all the three devices hub.
Serrato and switch, right, I hope you understand these devices correctly, because these are the most
important devices in any networking and you must understand the basic difference between all these devices
now before moving ahead.
You can see that I have taken enormous efforts to explain you all the concepts in very basic form.
So I request you to please leave a rating for our course because, you know, leaving a rating will
also help other students to know about this, because now we are not doing this for the money purposes.
We are just doing so that you can understand.
And if you find out that art is the only course on computer networking, which will explain you in every
detail.
So if you're enjoying the scores, please write us a review.
And if you have any grievances, let us know through the question and answer session.
We will try to address them as fast as possible in the next lecture.
We'll talk about firewalls.
Then we'll get to know InterXion about ideas and ideas and other devices.