NAT Explained - Network Address Translation 

So their will be no private IP addresses? Are you saying NAT will be obsolete?

Yeah I was just about say This! 🤣🤣

I thought the same thing. Lol

this had me dead :D

IPv12: Hello there

If you look at the rate of population growth, it’s impossible. We will be either extinct by then or be using a more advanced technology for device communication

Thanks :)

Actually, you are a multimodal learner. This video is instructed in a multimodal format. Everyone is a multimodal learner.

I also have Subtitles turned on. I have learned that while watching movies I retain more subtle plot details. It's working for learning as well and holy shit. I just unlocked another level of understanding for myself. Which is weird, because I cant retain anything by simply reading an educational book. Everything blends together too much in the aftermath.

Same, he needs to make coloring books too!

@@PowerCertAnimatedVideos seriously yes.

Just thinking that! haha

When we concord the universe. Then we will have ip v8 and ip v10 with more word and letter and number :v Even Sympol :3

With each IoT device....

with increasing AI and AI integration into all things humans, we will all have AT LEAST our own IP addresses (on our heads/hands) AS WELL as all other living things...and thats' before they decide to start applying nano-tech to our cells! Yeah that number can dwindle pretty fast....

@renragged: we won't run out because public IP address' are LEASED out for ~24 hrs so each public IP address that is used will be re-used over and over as older devices get phased out or as you people swap out cell phones every year ... Not all devices will access the internet for the rest of its life. At some point your device will shut down due to age, security, or failure at which point its public IP address will move on to another device ...

translate it :D

And that's the reason why starting using DNS names now for all.. but yeah i got the joke ;)

🤣🤣🤣 YESSIR!!!

that's not even a valid IPv6 address. but yeah got the joke!

Funny joke but if you’re computer is already connected to the company domain why would you need the ipv6 address of the server when you can just use your company email and password, created by the system administrator, to sign into your email account? Serious question.

True

truly true

Yeah he is the best

Same ...studying for my A+ and these vids help so much!!

I came here to say the same thing lol😂

Respect 👌

Hi Sir. Can you explain Double NAT in simpler way?

Thanks

Yes but you're not. *NOR* am I! See what I did there? Ok, I'll leave...

​@@axlearyakia AND i´m leaving too ;)

@@axlearyakia I don't see it guys! pls help this potato :(

@@hoola_amigos the symbol of NOT gate check it

Thanks!

PowerCert Animated Videos How does the router know which internal IP address should be used for incoming data?

Thank you.

Thank you so much

using port numbers?

I have also same question

this is the basic concept bro. Research about it.

I think router remembers the MAC address of the device which is unique....

They use the port preservation technique,bacially when outbound traffic passes through router,the router uses the same port as used by device and stores the port info internally and forwards it to server with its IP . When the incoming traffic returns on this port, the router knows from the data stored earlier, that it should forward this traffic to certain device with certain IP.

Hey, im using a wireless 5g home Internet which is connected by sim router zlt x21, i have a doubt to clear. The thing is i want to use my router in my car to access wifi while im travelling but the network disconnects, is this because of NAT enabled? I can only use in the area of my home

I do have a socket to plug my router in my car

@@FAZILG007 I don't think NAT would cause it to disconnect. What are you doing when that happens? Are you moving? If so, it might be something as simple as a temporary loss of the cell connection.

@@FAZILG007 Home wireless connections are often locked to a specific cell tower. If you want internet while you're driving, you'll be better off with a regular mobile sim in your phone. Does that answer your question? It should be entirely unrelated to NAT.

Ok let’s try to make things easy: 1- Dynamic NAT works like this: I have a private network with 3 host devices connected to a switch and the switch is connected to a router, ok? Now my three host devices I assign them private IP Addresses, lets say: Pc1 192.168.1.1 Pc2 192.168.1.2 Pc3 192.168.1.3 I have a Dynamic NAT Configuration in my Router, this DNAT contains a pool of public IP addresses, assume my pool is: 1) 65.2.2.1 2) 65.2.2.2 3) 65.2.2.3 Now lets say pc1 sends a message to the internet, the data will first arrive to the switch and from there to the router, the router will take the first public ip address from its pool of DNAT addresses, for e.g., this pc1 will take this public ip address: 192.168.1.1 :: 56.2..2.1 This is how it looks the DNAT mapping table in the router, if pc2 also want to go outside to the network, the router will give the second public ip from its pool; 192.168.1.2:: 56.2.2.2 so on and so forth When a reply comes from outside (internet) to this private network, the router will check the public ip address of the destination, lets say it’s for pc1: 56.2.2.1 So it will map 192.168.1.1:: 56.2.2.1 So the router says aha I got it this data is for pc1 So on and so forth, but this type of NAT It will consume a big amount of public ip addresses which is not free- So the solution is to use other type of NAT, which is the one used mostly, PAT (port address translation), PAT works like this: The router configured with PAT has only ONE public ip address for all hosts in the its private network, lets say this address is: 56.2.2.10 but followed by a port number, like this: 56.2.2.10:: 8080 For pc1 -56.2.2.10::8081 For pc2 So on and so forth therefore when pc1 wants yo communicate with outside world, the router will remove pc1’s private ip address (192.168.1.1) and assign him a public address followed by a port number like this; 56.2.2.1::8080 Every host will use same public ip addresses but with different and unique port numbers- There are 65,635 port numbers available (only few are reserved for well known protocols or apps.)

@@anwarahmed5342 confused

😂

I doubt it because in order to run out of ipv6 addresses every person in the world would have to have billions of internet connected devices.

It's literally physically impossible to create enough devices to use up all the IPv6 addresses. It's not about hoping we don't run out, or just guessing that we won't. It's simple maths. As someone else put so well: I dont think any of you understand how enormous that number is. If you had a job that paid you 390 trillion dollars per hour (US) you would have to work 24 hours per day, 7 days per week, 365 days per year for a just a little less than 100 quadrillion years to earn 340 undecillion dollars. You could literally start handing out IP-adresses to bacteria. Or this great one: So we could assign an IPV6 address to EVERY ATOM ON THE SURFACE OF THE EARTH, and still have enough addresses left to do another 100+ earths. It isn’t remotely likely that we’ll run out of IPV6 addresses at any time in the future.

It doesnt by IP address, all those devices share the same IP. Depending on the service it maybe browser cookies/persistent cookies, browsing thumbprint, GEO location or other data the app may collect without you knowing...yeah, kinda disturbing

It's pretty obvious question that every video that explains NAT left out and did not address (pun intended). So when the service request comes back to requesting router how does router know which device originally requested that?

@@Nexus9 What is this nonsense?

Doesn't make sense

Ipv6 can be used to address every single grain of sand on our planet. Logically we won't run out of ip addresses because no more sand, no silicon chips therefore no more devices.

🤦🏻‍♂️

Amaury Caminero 😂

Well, IPv6 has the potential of 340 undecillion addresses. IPv4 has access to approx 4 billion. To put it in perspective, even if IPv6 were limited to 340 trillion addresses (it's not, it's undecillion), that would mean we could supply 4 billion IPv4 addresses to 85,000 different planets. However, an undecillion triples that amount to 85,000,000 (85 million), then triples it again to 85,000,000,000,000,000,000 (85 quintillion). So, for us to run out of IPv6 addresses, every person of our 8 billion people on the planet would have to have more than 1 trillion personal devices they wanted to connect to the internet. We're not going to run out.

@@lannylangston Even though that's true, there is no guarantee that we will never run out of ip addresses by using IPv6. As we all know, technology has been evolving exponentially on those last decades, so I doubt that this amount of ip addresses will always be enough, after all a number being too big or too small is just a matter of perspective.

@fred that number is so big that the entire surface of the planet would literally have to be stacked shoulder to shoulder with people on every square inch, and each of those people would have to have over a billion devices each. Not going to happen. Ever. MAYBE if we colonize a few million other planets that are all on the same network.

@@lannylangston Damn, I didn't think about this detail at all and that's a pretty good point to state, but I still believe there is no limit for technology. :^) I mean, many circumstances could lead us to consume a lot more ip addresses without running out of physical space like building devices that are smaller, stacking higher amounts of them, having multiple virtual machines on a same device (which means a single device would use many ip addresses), etc. Anyway, when we finally run out of IPv6 addresses I won't even be here anymore. xd

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Thank you :)

izaac

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