A pointer (PTR) record is a type of Domain Name System (DNS) record that resolves an IP address to a domain or host name, unlike an A record which points a domain name to an IP address. PTR records are used for the reverse DNS lookup.
A Record - Maps FQDN to IPv4
AAAA Record - Maps FQDN to IPv6
CNAME Record - Maps name to name, sometimes call alias
PTR - Maps IP to FQDN (the opposite of A and AAAA)
The A record is one of the most commonly used record types in any DNS system. An A record is actually an address record, which means it maps a fully qualified domain name (FQDN) to an IP address. For example, an A record is used to point a domain name, such as "google.com", to the IP address of Google's hosting server, "74.125.224.147".
Correct Answer is: D
https://blog.dnsimple.com/2015/04/common-dns-records/
The A record is one of the most commonly used record types in any DNS system. An A record is actually an address record, which means it maps a fully qualified domain name (FQDN) to an IP address. For example, an A record is used to point a domain name, such as "google.com", to the IP address of Google's hosting server, "74.125.224.147".
I made an account just to reply to you. The answer is not D. The correct answer is B
CNAME record is for name to name. Also known as alias record.
A Record is used to map FQDN to IPv4 address
AAAA Record is used to map FQDN to IPv6 address
PTR Record is used to map IP address to FQDN (the opposite of an A record)
Not sure if you guys arent reading the question correctly or what, but the 100% correct answer is B. The practice test is wrong.
I said earlier on that the correct answer is D.
The A record is one of the most commonly used record types in any DNS system. An A record is actually an address record, which means it maps a fully qualified domain name (FQDN) to an IP address. For example, an A record is used to point a domain name, such as "google.com", to the IP address of Google's hosting server, "74.125.224.147".
Ref: https://blog.dnsimple.com/2015/04/common-dns-records/
o correto é A: Este é um tipo básico que estabelece a correspondência entre um nome canônico e um endereço IP. Além disso, podem existir vários registros A relacionados com diversas máquinas da rede (servidores).
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