 So I'm glad to present this session. It's an interactive section. You should have some fun I already delivered some fun while trying to mess with the resolution well, first of all I work in part that is an Italian company. I Play with C, Java and Python. I got some Red Hat and MongoDB certification. I should thank The company will work because they just give me a free ride with Plain and Hotel for one week in this wonderful city. So thank you, Bartek. Bartek provides expertise in IT infrastructure and business intelligence solutions and participates in various free and liberal open-source software. What will we learn today to the basic of our local area network? We will see a bit of communication basic An app game with no address resolution protocol and the switch game What is an address resolution protocol? You are not supposed to know because you should invent in your team a way to discover addresses And then if we can make it because it's a bit complicated The router game What is communication communication may is made of a standard and receiver. So standard receiver should be identified in some way Cellular phone and IME Internet devices There is a medium that is channel of communication and the conference. What do we have in the long communication but always in communication The content should be adapted to the medium. So we have the presentation. If I have to send a bigger message I should split it smaller chunk Today we try to learn it on your pen skin So what is a MAC address? MAC address is an address. It's six bytes. It is a medium address control. And for example, what is your name? You can you should write a static talk by and so on education and said and etc Then a European live streaming for those who didn't know this is the second message the third is I'll be presenting Okay, and in five minutes the winning team is the one that Goes the most with the oldest message Is that clear? Do you have the message? He can Okay, Alex Okay, so that's fine. That's fine. That's fine. That's fine. So okay, please stop for stop How many message have you delivered? One and a half almost Okay, so now Stop delivering and change topology. So two hubs are connected Okay, so when I have received a message issue delivery to the trip Devices connected with him Plus the second half Okay, more paper is coming People gets crazy Yeah So okay boys stop stop stop please and now some questions is Is the switch the switch? see that The hub is just like a straight line with two arrows. That means everybody gets everything while a switch gives to each frame the proper direction How does a switch work? Steady. I am steady still steady. You are going to go You should stop posting photos because there is no enough space to show you tweets It's always photos so Let's know only photos Okay, so now it's to Instagram Okay, I start with Rachel Wilmer Go Start with from the other part of the I just make more browser instances Just even the walkie-races So So these pages have been completed by everybody, right? Did you write the vkmc message? Everybody you're still here Okay, so let's start from here was not When we didn't want to and gone one switch one hub connected start five minutes Okay, you can see it. You can see it. That's it Okay closing in one minute a closing stuff, so This is the router set topology so for people in two switches and the router probably three on the one side four on one side And one of the people will make the router, but it's not for today if you're interested in You can Twitter me and if we reach the critical mess we can Go on so all that stuff Yeah, thank you Roberto