Name Server Concentration: Who Controls the Domain Name System?
Name servers (NSs) play a crucial role in how the Internet works, directing traffic to the correct destinations. Specifically, NS records tell recursive resolver servers which authoritative NS is responsible for a specific domain name. The resolver would then contact the authoritative NS to obtain the domain's corresponding IP address.
While having a small number of entities control a large portion of the DNS can increase efficiency, it could also result in choke points, where a single disruption could significantly impact a large portion of Internet traffic.