DNS Record Types

Question 1

What is an A type?

Answer 1

A is an address record type. Returns a 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host, but also used for DNSBLs, storing subnet masks in RFC 1101, etc.

Question 2

What is an AAAA record type?

Answer 2

Returns a 128-bit IPv6 address, most commonly used to map hostnames to an IP address of the host.

Question 3

What is CNAME record type?

Answer 3

Conanical name record. Alias of one name to another: the DNS lookup will continue by retrying the lookup with the new name.

Question 4

What is SOA record type?

Answer 4

Start of (zone) authoritaty record. Specifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.

Question 5

What is NS record type?

Answer 5

Name Server. Delegates a DNS zone to use the given authoritative name servers.

Question 6

What is PTR record type?

Answer 6

Pointer record. Pointer to a canonical name. Unlike a CNAME, DNS processing does NOT proceed, just the name is returned. The most common use is for implementing reverse DNS lookups, but other uses include such things as DNS-SD.