DNS Record Types Flashcards
What is NXDOMAIN?
The NXDOMAIN is a DNS message type received by the DNS resolver (i.e. client) when a request to resolve a domain is sent to the DNS and cannot be resolved to an IP address. An NXDOMAIN error message means that the domain does not exist.
What is an A record?
An A record points a DNS name to an ip address.
What is a CNAME?
A CNAME points a DNS name to another DNS name instead of an ip.
What are two fields needed to configure a CNAME in infoblox?
Configure the fields:
1) Alias - points to the Canonical name
2) Canonical Name - true DNS name/A record (name to ip)
What is a PTR record?
The PTR record resolves an IP address to a domain/host name. Also known as reverse DNS lookup.
What is an AAAA record?
Map name to ip in ipv6.
What is a NS record?
It is a nameserver (NS) record that specifies the authoritative DNS server for a domain.
What is a MX record?
A mail exchange (MX) record, is a DNS record type that shows where emails for a domain should be routed to. In other words, an MX record makes it possible to direct emails to a mail server.
What is a SOA record?
SOA stands for “start of authority.” It’s an important DNS record type that stores admin information about a domain. This information includes the email address of the admin and when the domain was last updated.
What is a TXT record?
TXT stands for “text,” and this record type lets the owner of a domain store text values in the DNS. Several services use this record to verify ownership of a domain.
What is a SRV record?
The DNS “service” (SRV) record specifies a host and port for specific services.
What is a CERT record?
This record type stores public keys certificates.
What is a DNAME?
The full meaning of DNAME is “delegation name.” This record type works very similarly to CNAME; however, it points all the subdomains for the alias to the canonical domain name. That is, pointing the DNAME for secondsite.com to example.com will also apply to staff.secondsite.com and any other subdomain.
What is a DNSKEY record?
Contains the public key that a DNS resolver uses to verify DNSSEC signatures in RRSIG records.
What is RRSIG (resource record signature)?
Contains the DNSSEC signature for a record set. DNS resolvers verify the signature with a public key, stored in a DNSKEY record.
