09-DNS Key Concepts Flashcards
1
Q
What is Domain Name System (DNS)?
A
It’s a system that translates domain names into IP addresses.
2
Q
What are Name Server (NS) records?
A
Delegates DNS management from one zone to another.
3
Q
What are A and AAAA records?
A
A Record maps a hostname to an IPv4 address whereas AAAA maps a hostname to an IPV6 address.
4
Q
What is a Canonical Name (CNAME) record?
A
Creates DNS aliases or shortcuts for hostnames.
5
Q
What is a Mail Exchange (MX) record?
A
Directs email traffic to the correct mail servers for a domain.
6
Q
What is a Tet (TXT) record?
A
Stores arbitrary text in DNS, often for validation and security purposes.
7
Q
What is DNS Time to Live (TTL)?
A
Specifies how long a DNS record is cached by a DNS resolver.
