Record Types Flashcards
A record
Used to point certain domain name at a certain IPv4 IP address
Round robin
A concept that involves iterating over a list of items one by one in an orderly fashion
Quad A record
Very similar to an A record except that it returns an IPv6 address instead of an IPv4 address
CNAME record
Used to redirect traffic from one domain name to another.
Mail exchange
MX
This resource record is used in order to deliver email to the correct server. Only for mail services.
Service record
SRV
Used to define the location of various specific services
Text record
TXT
Originally intended to be used only for associating some descriptive text with a domain name for human consumption
ICANN
Internet Corporation for Assigned Names and Numbers
Partners with IANA and handles TLD distribution
Domains
Used to demarcate where control moves from a TLD name server to a authoritative name server
Fully Qualified Domain Name
FQDN
When you combine all 3 parts together.
Ex: www.google.com
Registrar
A company that has an agreement with ICANN to sell unregistered domain names
DNS ZONES
To allow for easier control over multiple levels of a domain
Zone files
Simple configuration files that declare all resource records for a particular zone.
Start of authority
SOA
Declares the zone and the name servers that might also be responsible for this zone.
Name Server record
NS
Indicate other name servers that might also be responsible for this zone
Reverse lookup zone files
These let DNS revolvers ask for an IP and get the FQDN associated with it returned
Pointer record
Resolves and IP to a name
