- Can you have multiple A records in DNS?
- What happens when a domain has two different A records?
- Does a domain need an A record?
- Can an A record have multiple IP addresses?
- How many types of DNS records are there?
- Can I have multiple Cname records?
- How many nameservers can you have?
- What is PTR record?
- What is the difference between an A record and a Cname?
The DNS protocol itself using a (signed) 16-bit integer as a count of resource records returned for a query, so for a single query, there’s a limit of 65535 “A” records (less a SOA record for overhead) for a single name.
Can you have multiple A records in DNS?
DNS can hold multiple records for the same domain name. DNS can return the list of IP addresses for the same domain name. If a data-centre is down and the web-browser is unable to get a response from an IP address (i.e. a load-balancer), it will try to reach the address of the other.
What happens when a domain has two different A records?
You can do a lot with A records, including using multiple A records for the same domain in order to provide redundancy. Additionally, multiple names could point to the same address, in which case each would have its own A record pointing to that same IP address. The DNS A record is specified by RFC 1035.
Does a domain need an A record?
“A records (also known as host records) are the central records of DNS. These records link a domain, or subdomain, to an IP address. A records and IP addresses do not necessarily match on a one-to-one basis. If you set NS records for your share hosting then there is no need to set an A record in DNS manager.
Can an A record have multiple 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.
How many types of DNS records are there?
3 types of DNS servers—DNS Resolver, DNS Root Server and Authoritative Name Server. 10 types of common DNS records—including A, AAAA, CNAME, MX and NS.
Can I 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.
How many nameservers can you have?
At a minimum, you’ll need two DNS servers for each Internet domain you have. You can have more than two for a domain but usually three is tops unless you have multiple server farms where you would want to distribute the DNS lookup load. It’s a good idea to have at least one of your DNS servers at a separate location.
What is PTR record?
PTR record ( a pointer record ) is the certain type of DNS record that resolves an IP address to a host name. Getting reverse DNS going is done by finding the PTR records in use by a DNS server. These PTR records will be managed by the company that is in control of the IP address which was assigned to you.
What is the difference between an A record and a Cname?
There are important differences between these two records. The CNAME record points a name to another name instead of to an IP. An A record points a name to an IP . A CNAME record can point a name to another CNAME or to an A record.