I like to have full remote access to my main computer from anywhere (even when I’m on a train and only have my phone on hand). Before you can do this though, you need to configure port forwarding. Here’s all you need to know about port forwarding.
DNS settings are a fundamental part of running a website. As your online business grows, you need servers that can handle the increase in traffic. Traffic is sent to multiple servers in a web farm. You could also have a load balancer. This article explains round robin DNS, load balancers, and how you set up round robin settings on your DNS server.