This demo assumes you have a domain name registered through 1and1.com, and starts from their home page.
Now let's learn how to update our domain name's Nameserver settings.
Click Login to sign in to your account. Enter your domain name and password, the click Login. Then click the Manage Domain button. Click the Edit DNS Settings link. Under Name Server Settings, select to use Other name servers. Enter your new name server settings. Click Save when finished. Click Yes to confirm.
That's it! The domain name's nameservers have been updated. Please note that it could take up to 24 hours for your new nameservers to propagate and be recognized across the internet. This is the end of the tutorial. You now know how to update your domain name's nameserver settings at 1and1.com.