Domain Name System
Everything on SkillVeris tagged Domain Name System — collected across the glossary, study notes, blog, and cheat sheets.
7 resources across 1 library
Interview Questions(7)
How Does DNS Work?
DNS (Domain Name System) is the internet’s phonebook: it translates human-readable domain names like example.com into the IP addresses machines use to connect,…
What are the Common DNS Record Types?
DNS records are typed entries stored in a zone file that map a domain name to different kinds of information — most commonly an A record for an IPv4 address, A…
How Does DNS Caching Work?
DNS caching stores the result of a domain name lookup at multiple layers — the browser, the operating system resolver, and recursive resolvers along the way —…
Recursive vs Iterative DNS Queries: What is the Difference?
A recursive DNS query asks a resolver to fully resolve a name and return the final answer, taking on the work of contacting other servers itself, while an iter…
What is Reverse DNS?
Reverse DNS (rDNS) is the lookup that maps an IP address back to a hostname, the opposite direction of a normal DNS query, and it works by querying a special P…
What is nslookup?
nslookup is a command-line tool that queries DNS servers to resolve a domain name to its IP address, or an IP address back to a domain name, and can also fetch…
Authoritative vs Recursive DNS Server: What is the Difference?
A recursive DNS server is the resolver a client talks to that does the legwork of tracking down an answer by querying other servers on the client’s behalf, whi…