4.3 Name Resolution In Practice Flashcards
A Record
An A record is used to point a certain domain name at a certain IPv4 IP address.
ROUND ROBIN
Round robin is a concept that involves iterating over a list of items one by one in an orderly fashion.
QUAD A Record
A quad A record is very similar to an A record, except that it returns an IPv6 address instead of an IPv4 address.
CNAME Record
A CNAME record is used to redirect traffic from one domain to another.
MX Record (MAIL EXCHANGE)
This resource record is used in order to deliver email to the correct server.
SRV Record (SERVICE)
Used to define the location of various specific services.
TXT Record (TEXT)
Originally intended to be used only for associating some descriptive text with a domain name for human consumption.
NS, SOA Record
Are used to define authoritative information about DNS zones.
TLD
Top Level Domain
The last part of a domain name, is known as the TLD or top level domain.
ICANN
Internet Corporation for Assigned Names and Numbers
Handles administration and definitions of TLDs.
DOMAIN
A domain is the name commonly used to refer to the second part of a domain name.
Domains are used to demarcate where control moves from a TLD name server, to an authoritative name server.
SUB DOMAIN
The www portion.
FQDN
Fully Qualified Domain Name
Is the combination of:
1 TLD
2 DOMAIN
3 SUB DOMAIN
DNS Zones
The purpose of DNS zones is 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.
