Introduction ♫ Music ♫ Hello, welcome to your 3rd class HTML 5 My name is Gustavo Guanabara I am your teacher And in this lesson we'll learn a little about internet infrastructure Are you ready? Then we go to the presentation In the last class we stopped exactly at this point Where we learn network growth And we have seen that it is necessary to know a little more about internet infrastructure That's why we are here today To learn How the internet works Let's start with an initial hypothetical situation You have a computer "A" And you want to communicate with the computer "B" This communication can be simple If the computers are close You call them on the same LAN And transmission is performed however If "A" is far from the "B" We will need another means of communication As you may already know Computers are digital equipment Soon They operate based on a binary system of numeration Like this All data are represented on the computer They are in the format of "0" and "1" And that's what you get All that is represented on the computer, be it what is on your screen, saved on USB stick It is transmitted or even a button you pressed All this is represented by "0" and "1" This in a simple way, we humans work with the number of decimal system That's because we have 10 fingers on the hands! It is easier to perform accounts.
The computer is an electronic device Therefore, it is much easier to perform operations using the binary systems Since it is an electronic machine that operates through electronic signals. These waves "0" and "1" are represented in this manner What we call the Digital Signal So if the computer "A" is away from the computer "B" we need a means of communication For long distances; The phone is one of the most used today Or by dial-up (increasingly unusual) Or broadband services that use your phone as a base. It is important to say that not only is the phone that serves as a base!
You can use your satellite dish, cable TV or even radio antennas in small towns Regardless of the used communication method Most of the media do not use digital wave And yes the sine waves Known as analog signal Therefore It is difficult to convey a square wave by means that do not support these waves The solution is to use a specific apparatus To accomplish this communication this device Will perform the conversion of the digital wave . . .
For an analog wave This process is called "Modulation" And it is done constantly by this device Like this, Since the wave was transformed from an analog wave, It can be spread by its medium Then the signal goes from "A" and can get to the point "B" Once reaching "B" this signal must be converted back to a digital waveform This procedure is done by the same machine It also has a specific name It is called "DEMODULATION" So you go back to having the original signal that was in "A" And this way the data has been successfully transmitted If you understood well here It must have understood that this device is very important. And he has a name . .
. As you saw, This unit is responsible for performing the "modulation" and "demodulation" The name of this device is taken exactly these terms And you have heard often it And modem The MODEM is nothing more than a evenly-matched which makes modulation and demodulation of a signal You already knew that? So .
. . the modem name come from .
. . "modulation" "demodulation" What are the terms in English to, modulation and demodulation It's great when we can understand something, understand any term, when you study Speaking of study, I will introduce to you one of our sponsors .
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back here to class We had understood that the modem is the equipment that makes the modulation and demodulation So now you understand How does a computer "A" can talk to the computer "B" Let's imagine then that the computer "B" has a file The computer "A" needs The data transmission It is made once So you might think that the "B" has this file And you want to pass it on to the computer "A" Through the internet protocols These files are broken into small packages or datagrams These packets are transmitted at a time Even different paths To arrive at "A" Getting there Protocols are also responsible By rearranging these packages And again generate the original file Understood as the files reach the point "B" to "A" on the Internet? But this raises another question Then I ask you, as the "A" know how to get the "B"? Let us understand Looking at this design you can think The computer "A" knows the computer phone "B" But is that everything is done through a phone number?
As I said previously You can use various types of communication Such as Cable TV Cable TV has no number How to solve this problem? Let us understand a little more about the network infrastructure When you are at home and will communicate with the internet Your modem communicates directly with modems Your ISP Access provider is a company Which as its name says Will give you access to internet When you connect to internet Your computer receives an ID This identification is called IP It is a number consisting of 4 octets Or number 4 parts This happens with any type of device that connects to the Internet Be your notbook your desktop (desktop) Or even powerful servers that are on the internet These servers have IP as well as your computer Let's imagine that you open your browser And enter a site, for example the site of Hostnet As you can see, the site of Hostnet This stored on one of those servers that you are seeing But how to know which server exactly Stores the site that is in "Hostnet. com.
br" This becomes difficult initially For servers do not have names, but numbers For this the internet infrastructure another surprise booking special servers called DNS DNS servers or domain name servers They are responsible for solving this problem we infrentando If you pay close attention to site address typed You will see the end of it is ". BR" Like this To find which server has the site of Hostnet You will be redirected to the DNS Containing sites with address ending in ". BR" What is DNS Brazil DNS that there are a table, or like a phone book Where each site is identified by the IP of your server This currently located So, for example, the website of Hostnet That our example is stored in the IP "182.
73. 33. 42" This IP is transmitted directly to your machine Now you know that the site is Hostnet this address Therefore Just identify which server This stores the site we want This will happen to all the sites you access During your navigation Remember the story of the computer "A" and "B"?
Your computer would be the "A" And Hostnet server would be the "B" Now the transmission can happen In the Hostnet servers You have HTML, JPG files that are all MP3 and MP4 are songs that are videos and more These files will be transmitted to your machine That way I explained, through packages The HTML is then sent directly to your browser That will interpret your code And show the site you chose on the screen You see how easy it is? So this is how it works Your machine would be the computer and the server another You have to have access to this server And that is what serves Hostnet The Hostnet is a company specialized in web hosting So when you build a website You will need a place to put HTML files ses The Hostnet is the best option from Brazil It is a company with over 10 years of merchant With high-tech servers And the latest generation system There you will also be able to buy a domain But what is this? Is the name of you to your site for example "www.
cursoemvideo. com" This is an area This domain you will have to buy And only an annual payment it is yours for 12 months So this is the Hosnet is the best company you will have To purchase your domain and host your site What you saw is the internet infrastructure From now is everything with you We will learn all the HTML tags And related technologies such as CSS 3 and JavaScript And with all that we learn We will be able to build the full site This then is our pursuit That is our goal from now That our HTML course 5 That's it, end of another class You really start making your HTML All you have learned so far It was very important for the construction of knowledge Until you reach that point there Now you know what a server You know what a domain, you know what a hosting You know how the transmission of data between computers This is very important and very valuable Since the history of the internet, to the infrastructure Do not forget, subscribe to the channel To have access to all classes that will leave And click here to see all classes that have been created to date In the course of HTML 5 See you next practice part You can not lose! Hello!
Welcome to another HTML class (Wrapped Speaks), I think this is great Hello! Hello! He saw how easy it is, then that is 3x (see how easy it .
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) That's how it works Then that's it!
