Names and DNS
Forwarding resolver
A resolver that keeps a cache but sends every other question, whole, to one upstream resolver.
A recursive resolver walks the tree from the root itself. A forwarder (a home router's DNS, an office
cache) hands each question it cannot answer to an upstream resolver with recursion desired, often a public one:
Cloudflare 1.1.1.1, Google 8.8.8.8, Quad9 9.9.9.9, OpenDNS. The upstream sees the forwarder's address,
not the device's, and decides every answer: its speed, uptime, logging and filtering become yours.