What is DDNS? dynamic domain name system.

dynamic domain name system

 What is DDNS? Now DDNS  stands for dynamic domain name system,  if you type in a web address in your web browser, DNS is what transforms that domain name  to an IP address. So for example when you  type in youtube.com in your web browser, the DNS  server will search through its database to find a matching IP address for that domain name, and when  it finds the IP, it'll transform that domain name  to the IP address of the YouTube web server. In a  DNS database, a domain name such as youtube.com, is mapped or joined to an IP address, and that  IP address must not change. In other words, it must be a static IP because if YouTube's  IP address changes to a new IP address, people will not be able to access YouTube's  website because youtube.com is still joined to the old IP address. So if the IP address does  change, DNS will update their database with the new IP address for youtube.com, so people can find  YouTube. Now this may not sound like a big deal, however the problem is, is that it could take  up to 24 hours for DNS to update their database with the new IP and that is a problem because that  means that YouTube will lose up to 24 hours worth of business until DNS does the update. And this  is the main reason why websites, organizations,  and companies use static IP addresses and not  dynamic IP addresses. So DNS is used with static  IP addresses but dynamic DNS is used with dynamic  IP addresses. A dynamic IP address is where an IP 

dynamic domain name system

address gets an IP from a DHCP server, therefore  the IP address changes periodically. Dynamic DNS is a service that allows you to access devices  that are in your home, such as a computer, router, or security camera, and you can  access them from anywhere in the world, even if your IP address changes. Dynamic DNS is  mainly used in homes because internet service  that are used in homes are given a dynamic IP  and not a static IP. So let's do an example,  let's say you're at work and then you wanted to  access your home computer using Microsoft remote  desktop. you would open up the remote desktop  service from your work computer and then you would type in the IP address for your home and then you  would type the password and then you're connected.  you already knew what the IP address was for  your home because you either wrote it down or maybe you memorized it, however since you have a  home account with your internet service provider, your IP address is dynamic and it will change  periodically and if it changes without you knowing about it, the next time that you want to  remote access your home computer, you will not be able to because you're typing in your old IP  address and not your updated one. this is where dynamic DNS comes in. Dynamic DNS allows  you to access your home computer even if your IP address changes. It allows you to create a  custom hostname, such as 'myhomepc.ddns.org' or whatever and then you can link that hostname  to your computer. So if your home IP address does change, dynamic DNS will update the new IP address  and map it to your custom hostname automatically. 

dynamic domain name system

dynamic DNS will ensure that you will always  have access to your home computer even if your  IP address changes. So for example now let's say  you wanted to access your home computer again, but instead of typing your home's IP address,  you would type in your custom hostname that you  created with dynamic DNS. So you would type in   'myhomepc.ddns.org' and then you'll be connected. no matter how many times your IP address  changes, it doesn't matter, because whenever you want to access a device in your home you will  always use your custom hostname instead of the IP address. And dynamic DNS will always make sure  that the correct IP address is mapped to your custom hostname. And if you're interested  in getting a dynamic DNS service, there are  several vendors that you can choose from, with  some you have to pay, but some are also free.