Original subtitles

All right, well, hello, guys.

So this is going to be our first lesson.

And I want to.

Well, I want to start with the very basics as much as possible and I want to be upfront with you.

We're going to have a lot of fun and learn a lot of great things.

Sure, sure, sure.

You might just be thinking right or substance, which is what can be exciting about that.

And yeah, those are the three main terms of this particular course router hubs, switches.

These terms might not mean anything to you the moment you might have some sort of a nightmare about

them.

But that's all right.

You don't even have to worry about it because at the end of this video, your situation is going to

be different.

Your world is going to be turned upside down and just as if your mind is.

Blown.

Because we're going to be going through everything, and I typically use a lot of metaphor and simile

when I'm talking about a topic, you'll get used to that as we continue over time.

But I think that when you're talking about networks and any kind of of of connections we got to have.

A metaphor analogy to make it human understandable, right?

Anyway, you'll understand as we continue.

So it kind of goes like this if you want to compare a router to anything.

I would choose highways.

And the signs on those highways, right, signs him routers.

Pretty much do the same thing.

So signs on the road.

Direct car traffic routers direct data traffic by saying where they should all go properly.

I mean, yeah, if you want to nitpick, probably the only difference in the analogy is signage doesn't

really care who's going to pass underneath of it, but routers control all the data that use it.

And say whether it can pass or not.

Now, I want you to have a look at the picture.

Also, the pictures, OK, so see how routers can connect two or more computers and check it out.

They can provide a smooth and controlled data transfer between them.

In fact, at the speed of light, we're talking about electricity here.

All right.

I'm not going to get ahead of myself yet.

That's that's for later.

So hub and switch, these are networked devices that are used to establish connections between computers.

The terms hub and switch.

Well, they can often get conflated and people confuse each other.

Well, these two concepts are actually quite different.

Hubs are just devices generally used to connect segments of a LAN local area network.

The hub has multiple ports.

So when a packet reaches one port, it's copied to other ports so that all segments of land can see

all the packets.

So if data is to be sent within the network hubs, send this data to all computers.

All right.

The computer that will receive the data confirms whether the data has been sent to it or not.

Receives the data if it's sent, but because it distributed data to the entire network, the let's call

it the traffic density or like rush hour on this network is pretty high.

And think about your favorite highway in rush hour.

The performance is pretty low.

All right, so the hub will evenly distribute the bandwidth of a network to the connected devices.

So it's to say if the bandwidth of the network of five devices are connected and the bandwidth as 100

megabits per second.

Well, that means that the bandwidth of each device is going to be 20 megabits per second.

Right, 100 divided by five.

So therefore, it is not utilised in large scale networks that require high bandwidth and performance.

Now, hub devices can be subdivided into two different categories.

There's active and there's passive, so the Active Hub actually amplifies and transmits the incoming

signal in a passive hub, transmits the incoming signal directly to the devices on the network without

doing anything to it at all.

So for this reason, the active hub is used to eliminate cable loss in longer distances, right, because

the longer distances got to travel, the less effective that signal is going to be.

Now, let's talk about the switch.

So it's the switch, which enables a transfer of information between the computers in workplaces.

It's one of the technologies that really does make our lives easier.

So the short answer to the question of what is a switch can pretty much be this.

It's an element that provides communication between computers to which it is connected.

An element.

The provides communication between the computers to which it's connected, right?

So Switch technology is used more frequently in workplaces today, and it's thanks to switches.

Employees can easily transfer files and save a lot of time.

I know if you remember what it was like to, you know, just pull out your little U.S. b drive and run

it down the hallway.

Well, think about that for a second.

Don't have to do that anymore.

So switch technology is a lifesaver for people who have, let's say, a printer or more than one computer

at home, and they want them all to be connected the same time.

So devices connected to Switch technology, each device referred to as a node.

All right, so it's thanks to the Switch technology that all the operations on the devices to which

the nodes are connected are handled in a short period of time.

So devices are connected to the ports on the switch and setup is done on computers.

So that means that transactions are always faster by switches.

So the most important feature of Switch technology.

I'd say that bandwidth is used the same for each port.

So what that.

Particularly means is if the switch to which the ports are connected has a speed of 75 megabits per

second.

Each of the devices that you connect to the Switch port will operate at 75 megabits per second.

No loss, right?

So all the devices connected to each other with the Switch operate at the same speed.

So you see how your your work is done immediately.

All right, cool.

So, hey, we just learned about routers, hubs and switches.

Yeah, OK.

So maybe I got a little bit silly there because I get excited, but I want to point out to you that

now you know the difference between routers and switches.

So I don't know.

Maybe you got a little drowsy, but at least you know, a little something more than you did before.

All right.

So I'll see you in the next lesson and we'll have some more fun.