In order to register a domain you have to contact domain registrars such as www.godaddy.com, www.domain.com and others.
After you have acquired a domain, you need to link your domain to your server's IP address. Here are a few ways to accomplish this:
To direct the domain to your server, refer to your domain administrator to change the NS servers of the domain to:
You can do this through the administrative panel of your domain, or refer to support from your domain administrator.
To point your domain at your server, you can point the A record of your domain to the IP address of your server.
This can be done through the administrative panel of your domain zone
By using the alternate method, you will be unable to manage the domain zone using ServerSuit.