also: ルートサーバー
noun
root server
In the Domain Name System (DNS), a root server is one of the authoritative servers for the root zone.
DNSのルートサーバは世界中に13種類ある。
There are 13 types of DNS root servers worldwide.
noun
route server
In computer networking, a route server is a device that provides routing information to connected routers.
IXではルートサーバが経路情報を提供する。
At the IX, the route server provides routing information.