DNS

This is a source of general information about Domain Name System aka DNS.

The DNS server stores different types of resource records used to resolve names, records like:

• A - an end device IP address
• NS - an authoritative name server
• CNAME - the canonical name (or Fully Qualified Domain Name) for an alias; used when multiple services have the single network address, but each service has its own entry in DNS
• MX - mail exchange record; maps a domain name to a list of mail exchange servers for that domain

The ipconfig /displaydns command displays all of the cached DNS entries on a Windows computer system.