Is An A Record Required?

What is DNS AAAA record?

An AAAA record is used to find the IP address of a computer connected to the internet from a name.

The AAAA record is conceptually similar to the A record, but it allows you to specify the IPv6 address of the server, rather than the IPv4.

The DNS A record is specified by RFC 3596..

Can you have multiple Cname records?

While you are allowed to create multiple A and CNAME records for the same destination, you can set only one A and CNAME record per source or host name.

Is a Cname a subdomain?

A CNAME record is an alias for a subdomain. When you configure a CNAME record for a subdomain, DNS queries are no longer sent for the subdomain but for the domain or subdomain specified in the CNAME record to the appropriate name server.

What is the difference between an A record and a host record?

A records and AAAA records are “address records” (hence the “A”) that map a hostname to an IP address. … Because of that hostname -> IP mapping, some people refer to those records as “host records”. AAAA records are the same concept, except for IPv6 128-bit addresses. A records are for IPv4 which are 32-bit addresses.

How many a records can you have?

maximum:13 You can have unlimited number of IP address or A records for your domain name or sub-domains.

Can two servers have the same hostname?

Question 1: Yes it is possible for multiple devices to have the same hostname on a network, you can simply change the name of any two computers on a network and they will share the same hostname.

What is a zone apex?

The zone apex is where the SOA and NS (and often MX) records for a DNS zone are placed. They are DNS records whose name are the same as the zone itself.

What is an a record for a domain?

A Records. A Records are the most basic type of DNS record and are used to point a domain or subdomain to an IP address. Assigning a value to an A record is as simple as providing your DNS management panel with an IP address to where the domain or subdomain should point and a TTL.

Can MX record point to IP address?

It’s not possible for an MX record to have an IP address as its data.

How does an A record work?

Emails are routed through to the IP address which is set in the A-record of the host. … The A-record (or address-record) determines which IP address belongs to a domain name. This record ‘translates’ the domain name to an IP address.

What happens if no MX record?

According to the Section 5 of RFC 5321, if no MX record is present mail servers should fall back to the A record for the domain.

What is an A record?

The A in A record stands for Address. Whenever you visit a web site, send an email, connect to Twitter or Facebook, or do almost anything on the Internet, the address you enter is a series of words connected with dots. … A Records are the simplest type of DNS records, and one of the primary records used in DNS servers.

Do you need an A record for email?

The A record simply points the host name to the IP address, and it can be used for any host not just mailservers. The MX record is specific to Mail eXchange. … If you do not have this then you will see email rejects. Then you will also need an A record to map the host to the IP address.

Can an A record point to two IP addresses?

Yes you can have multiple IP’s for the same A record. There’s a few problems with this if used for redundancy purposes… DNS servers and DNS resolvers randomly choose the order of the list of IPs – even though you might configure it a certain way on your DNS Server hosting the zone, resolvers will flip it.

Can an A record point to another domain?

CNAME records must point to another domain name, never to an IP address. A hostname defined in a CNAME record must have no other resource records of other types (MX, A, etc.), except for DNSSEC records like RRSIG and NSEC.

What is the difference between an A record and a Cname?

The A record maps a name to one or more IP addresses when the IP are known and stable. The CNAME record maps a name to another name. … The ALIAS record maps a name to another name, but can coexist with other records on that name. The URL record redirects the name to the target name using the HTTP 301 status code.