- Why do I have 2 DNS servers?
- Why would you want to have multiple name servers?
- Can I have 2 A records with the same IP address?
- Can a domain have two IP addresses?
- What are child name servers?
- Can an A record point to two IP addresses?
- Can a domain point to multiple servers?
- What happens when a domain has two different A records?
- Can I use the same domain name?
- What happens if I change my nameservers?
- Can I use 2 different DNS servers?
- What happens when a domain with two NS records in its zone is queried?
- What are the two different types of DNS requests?
- What is DNS round robin configuration?
- What are nameservers used for?
- How can I add more than 2 DNS servers?
- What is the minimum TTL?
- What is the difference between a zone and a domain in DNS?
Why do I have 2 DNS servers?
The major point in having a secondary DNS server is as backup in the event the primary DNS server handling your domain goes down.
A secondary DNS server is always up, and ready to serve.
It can help balance the load on the network as there are now more than one authoritative place to get your information..
Why would you want to have multiple name servers?
Yes if you main server goes down you’re offline, but multiple name servers will protect you from one of those being unavailable. In some settings name servers also get quite busy and don’t answer quickly, so DNS clients may fail over to a secondary server just from load.
Can I have 2 A records with the same IP address?
You can do a lot with A records, including using multiple A records for the same domain in order to provide redundancy and fallbacks. 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.
Can a domain have two IP addresses?
Yes, that is possible, and will need to be two A records. This is called Round-Robin DNS. Clients will semi-randomly use one of the two addresses. The certificate is not tied to the IP address, only to the domain name,so if it is installed on both servers, there should be no issues with SSL.
What are child name servers?
Child Name Servers are private labelled name servers which are registered with domain registry under your own domain name. Child Name Servers needs to be registered with registry and also it’s A record needs to be pointed to IP address of DNS Server before they can be used as name servers with other domain names.
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 a domain point to multiple servers?
Yes, you can add it to two servers, if your settings (e.g.in cPanel) are configured to allow domains to be added if the DNS is not pointing there. No, you cannot have the same domain name publicly visible from two sources. Your DNS with either point to the one server, or the other.
What happens when a domain has two different A records?
2 Answers. Yes you can. It is called round-robin DNS, and the browser just chooses one of them randomly. It is a well used method of getting cheap load balancing, but if one host goes down, users will still try to access it.
Can I use the same domain name?
Yes, you can. You can point your domain name to your hosting server. You can also keep both domain names pointing to the same website. However, search engines consider it duplicate content and that will affect your search rankings.
What happens if I change my nameservers?
Although it will be invisible to visitors, a change in nameservers will result in a change in the hosting server for the website. The URL that visitors use to access the site may remain exactly the same; however, the website will be hosted on a different computer.
Can I use 2 different DNS servers?
You may have two DNS servers, but you only need one. … If you need consistent numbers, configure the dhcp server by creating dhcp reservations based on the client’s MAC address. That way each box always get the IP you set, but you’re not dealing with each client directly.
What happens when a domain with two NS records in its zone is queried?
When overlapping zones are defined on an authoritative nameserver, the most specific zone is used to provide the answer. A query of example.com. … If foo.example.com is defined in the example.com zone, it will be ignored. A query of sub.foo.example.com.
What are the two different types of DNS requests?
What are the two types of DNS requests? What do they each do? Recursive Query – Query that demands a resolution or the answer that it can’t be found. Iterative Query – Query that does not demand a resolution.
What is DNS round robin configuration?
Round-robin DNS is a technique of load distribution, load balancing, or fault-tolerance provisioning multiple, redundant Internet Protocol service hosts, e.g., Web server, FTP servers, by managing the Domain Name System’s (DNS) responses to address requests from client computers according to an appropriate statistical …
What are nameservers used for?
Nameservers play an essential role in directing traffic on the Internet by helping to connect your domain name with the IP address of your web server. To do this, they help web browsers and other services access your domain’s DNS records.
How can I add more than 2 DNS servers?
On Internet Protocol Version 4(TCP/IPv4) Properties page click on Advanced button. In Advance TCP/IP Settings page click on DNS tab and click on Add button. On TCP/IP DNS Server box type the address of additional DNS server and click on Add button.
What is the minimum TTL?
Set that minimum TTL to something between 40 minutes (2400 seconds) and 1 hour; this is a perfectly reasonable range.
What is the difference between a zone and a domain in DNS?
A domain is a logical division of the DNS name space whereas a zone is physical, as the information is stored in a file called a zone file. In most cases you have a 1 to 1 relationship between a Domain and a DNS Zone i.e. the domain mydomain.com would be stored in a zone file called mydomain.com.