Since 2000, Netnod has operated i.root-servers.net, one of the Internet’s 13 root name servers and the first to be located outside of the United States. The root name servers, identified by letters A through M, provide the entry points to the Domain Name System (DNS) and are a critical part of the Internet’s infrastructure. In this post, Netnod Senior Systems Specialist Lars-Johan Liman explains the challenges of operating one of these servers.
The DNS is a remarkably simple system. You send it queries and you get back answers. Within the system you see exactly the same simplicity: The DNS resolver that receives your query may not know the answer, so it, in turn, will send queries deeper into the system and collects the answers. The query and response process is the same, applied recursively. Simple.
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