4º DIGITALISATION MALL NETWORK | Mediateca de EducaMadrid

You ever walk through a modern shopping mall and just stop and wonder how it all works? 00:00:00

You've got the digital signs, the public Wi-Fi, the cash registers in every single shop, 00:00:05

all running smoothly. It feels like magic, right? Well, behind that seamless experience, 00:00:10

there's this invisible, super complex web that makes it all possible. 00:00:15

Today, we're going to pull back that curtain and actually design one of these networks from scratch. 00:00:19

So let's really think about it. What does it take? I mean, beyond the actual stores, 00:00:24

and the food court, what is the one single thing that a modern shopping center absolutely cannot 00:00:30

survive without? You can't see it, you can't touch it, but if it goes down, the whole place grinds to 00:00:34

a halt. You guessed it, it's the network. It's the mall's digital nervous system. It connects every 00:00:40

single device. From the manager's laptop to the printers in the back of a shop, it lets them all 00:00:46

talk to each other, share info, and get out to the big wide world of the internet. It really is the 00:00:52

engine that runs the modern mall. Okay, so let's get our hands dirty. We're going to build this 00:00:58

digital nervous system ourselves. And we're going to follow the blueprint of a final project from a 00:01:03

digitalization course. So the mission is clear. Design a complete, working, and secure network 00:01:07

for an entire shopping mall, starting with basically nothing but a list of what needs to 00:01:13

get connected. And here's what we're working with. This is the scope of our challenge. We have to 00:01:17

connect all of these different areas. You've got the public-facing spots like the 15 shops and a 00:01:22

huge supermarket. Then you have the critical back office places like admin and the GM's office and 00:01:27

even a private apartment for the caretaker. Every single one has its own unique needs. 00:01:32

Now, before we plug a single thing in, we have to lay down some ground rules. Every device on 00:01:38

our network, and I mean everything from a server to a printer, needs its own unique address. It's 00:01:43

just like how every house on a street needs a number. We call this its IP address, and it's 00:01:50

how all the devices find each other and talk. 00:01:55

Okay, don't let this string of numbers scare you. 00:01:58

The subnet mask, think of it like the zip code 00:02:00

for our mall's private neighborhood. 00:02:02

It's what tells every device how to know 00:02:04

if a message is for someone local, inside the mall, 00:02:06

or if it's long distance and needs to go out to the internet. 00:02:08

It's what creates our safe, secure digital bubble. 00:02:11

And to keep things from getting chaotic, we make a plan. 00:02:14

It's kind of like city planning for our digital world. 00:02:18

All the important infrastructure, 00:02:20

the switches and routers, they get the low numbers. 00:02:21

Then we group all the printers together, 00:02:24

then the computers, then mobile devices. 00:02:26

This kind of organization is gonna save us 00:02:28

so many headaches later on 00:02:30

when we have to manage this thing. 00:02:31

Now in our little digital city, 00:02:33

there are three addresses that are the absolute VIPs. 00:02:35

First, you've got the gateway router at .250. 00:02:38

That's our one and only secure door to the internet. 00:02:41

Then there's the application server at .90. 00:02:44

This is the central brain 00:02:47

holding all the important mall data. 00:02:48

And finally, the DNS server. 00:02:50

Think of it as the internet's phone book. 00:02:52

It translates names you can read, like google.com, 00:02:54

into numbers the computers can read. 00:02:57

So how do all these things actually connect? 00:02:59

Well, there are basically two ways. 00:03:02

You've got your wired connection, 00:03:05

that's the super fast, super stable pipeline 00:03:06

for our most important gear, like servers. 00:03:09

Then you have Wi-Fi, which is all about flexibility 00:03:11

for things that need to move around. 00:03:14

The secret to a great network is knowing exactly 00:03:16

which one to use and when, which is what we're about to see. 00:03:18

All right, we've got the rules, 00:03:22

we've got the addresses, we've got the connection types, 00:03:23

it's time to look at the blueprint. 00:03:26

Think of this as the master plan for the whole network. 00:03:28

This map is gonna be our guide as we go on a virtual tour 00:03:31

and bring this mall's digital nervous system to life, 00:03:34

one room at a time. 00:03:37

So we're gonna zoom right in. 00:03:39

We'll look at the key areas of the mall, 00:03:41

we'll place the hardware, we'll assign the connections, 00:03:43

and we'll bring each and every space online. 00:03:45

You ready? 00:03:47

Let's go. 00:03:48

Our first, and you could say most important stop 00:03:49

is the administration office. 00:03:52

This is the command center. 00:03:54

It's the heart of the whole operation, 00:03:55

where all the really critical data lives. 00:03:57

Getting this part right is absolutely essential. 00:04:00

And you can see our strategy in action right here. 00:04:03

Look at what's plugged in with a wire, 00:04:06

the application server, the desktop PCs, 00:04:07

the big network printers. 00:04:10

We need maximum speed and rock solid reliability here 00:04:11

so they get a physical cable. 00:04:14

The Wi-Fi router, that's there to give flexible access 00:04:16

to anyone who might bring a laptop or phone into the office? 00:04:19

OK, from the main admin hub, let's 00:04:22

head down the hall to the general manager's office. 00:04:24

The setup in here is a little bit different 00:04:27

because it's tailored for just one user who has 00:04:29

some pretty specific security needs. 00:04:31

See the setup? 00:04:34

The manager's laptop is wired right into the internet. 00:04:35

That gives a secure, super stable connection 00:04:38

to that central server. 00:04:40

But check this out, the printer. 00:04:42

It's a local printer. 00:04:44

That means it's not on the network at all. 00:04:45

It has no IP address. 00:04:46

It's plugged directly into the laptop, 00:04:48

which keeps any sensitive documents 00:04:50

completely off the shared system. 00:04:51

It's a simple but really effective security move. 00:04:53

All right, now for the fun part. 00:04:56

We are heading out onto the main mall floor 00:04:59

to get the retail shops connected. 00:05:01

And remember, the plan we're making here 00:05:03

isn't just for one shop. 00:05:05

It has to be a template that we can copy 00:05:07

and paste 15 times over. 00:05:09

So inside a typical shop, 00:05:12

we've got a really smart mix of tech. 00:05:13

Wi-Fi gives general internet access for the staff's devices. 00:05:16

The main color printer is wired in for reliability, 00:05:19

but a second black and white printer 00:05:22

is on Wi-Fi for convenience. 00:05:23

Now, here's the most important part. 00:05:25

The chip and PIN machine, the one that takes card payments, 00:05:27

it is not on our data network, no way. 00:05:30

It uses a totally separate dedicated telephone line 00:05:32

for maximum security, that's non-negotiable. 00:05:35

Our last stop on the tour is the busiest place 00:05:38

in the entire mall, the supermarket. 00:05:41

It's got multiple checkout lanes, so the network here has to be tough, reliable, and totally secure. 00:05:44

And at each of the five tills, you see the same pattern. 00:05:50

The main till system can access the mall's internet to update sales data for management. 00:05:54

But, just like in the smaller shops, the payment machines are on their own isolated phone lines. 00:05:59

And the little receipt printer? That's local. It plugs right into the till itself. 00:06:04

No network, no IP address needed. It's all about reducing risk where it matters most. 00:06:09

So, we've toured all the individual rooms, we've connected all the devices, now it's 00:06:14

time to zoom back out and see how this whole thing actually works together as one big system. 00:06:19

How does a request from a shop actually get to the server and back again? 00:06:24

Let's follow the data for a second. 00:06:29

Let's say a shop computer needs the latest sales figures. 00:06:31

That request flies through the air on Wi-Fi to a central switch. 00:06:33

The switch acts like a traffic cop. 00:06:36

It knows exactly where the application server lives, at address dot 90, and sends the request 00:06:38

straight there. 00:06:42

The server grabs the data and sends it right back. 00:06:43

Now what if the manager wants to check a website? 00:06:46

Their request goes to the gateway router, our door to the internet, which zips out, 00:06:48

grabs the page, and brings it back. 00:06:52

It's this constant high-speed dance of data happening every second. 00:06:54

And there you have it. 00:06:58

By following our blueprint, by applying that smart IP address plan, and by choosing the 00:06:59

right connection type for every single device, we've designed a complete digital infrastructure. 00:07:03

We have built the nervous system for a fully connected, intelligent, and totally operational 00:07:09

shopping center. 00:07:14

You know, it's pretty fitting that the original project instructions had this quote in them. 00:07:15

Because in network design, just like in trying to explain it, order and clarity are everything. 00:07:21

A well-structured plan is the difference between a system that just works and one that is a 00:07:26

constant nightmare to manage. 00:07:30

So the next time you're out and about, maybe you're in a hospital, an airport, at your 00:07:32

school or even your office, just take a look around. Now that you've seen the blueprint for 00:07:36

a mall's network, where else can you spot these invisible nervous systems quietly connecting and 00:07:41

running the world all around you? 00:07:46

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