The DNS does not directly relate to Internet speed, though it is a system of Internet queries and responses that make the delivery of a website possible. There are various factors that can affect the connection being established, and these can slow down website delivery. For example, DNS queries may experience high levels of traffic or need to be rerouted multiple times.Signing up to advanced DNS services like PremiumDNS is the best way of ensuring you experience no slowness due to DNS. Here are some other tips for dealing with slow DNS issues.