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Why are there 2 DNS servers on my router?

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Why are there 2 DNS servers on my router?

8 Answers. 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.

What do I put for primary and secondary DNS?

Tap “Primary DNS” and enter in 208.67. 222.222, ensuring you are entering the “.” between each number, then tap “OK” to return to the DNS screen. Tap “Secondary DNS” and enter in 208.67. 220.220, then tap “OK” to return to the DNS screen.

Why are there 2 DNS addresses?

In most cases, a primary and a secondary DNS server are configured on your router or computer when you connect to your internet service provider. There are two DNS servers in case one of them happens to fail, in which case the second is used to resolve hostnames you enter.

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Should I have 2 DNS servers?

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 happens if you have multiple DNS servers?

Most, if not all DNS service providers, use multiple nameservers for high availability and redundancy, allowing them to mitigate most issues without clients even being aware. Clients and downstream DNS servers see them as a single DNS source, and it is up to us to ensure that they are kept in sync.

What happens if primary DNS down?

Provides redundancy in case the primary DNS server goes down. If there is no secondary server, when the primary fails, the website will become unavailable at its human-readable domain name (although it will still be accessible by its IP). Distributes the load between primary and secondary servers.

Do primary and secondary DNS have to match?

DNS servers can be primary for one DNS zone and secondary for another DNS zone. A secondary server holds a secondary DNS zone—a read-only copy of the zone file, which contains the DNS records. Secondary DNS servers are not mandatory—the DNS system can work even if only a primary server is available.

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Can primary and secondary DNS be the same?

There can be both primary and secondary servers within the primary DNS server network. The secondary DNS server is an authoritative server that obtains information about a zone from the primary server via zone transfer.

Can I use 2 DNS at the same time?

Answer: A: You can’t actively use two DNS servers to do lookups unless you write a program to do that for you. BobTheFisherman has that algorithm exactly right. I listed a Verizon DNS and an OpenDNS as my first and second entires.

How do I check my secondary DNS?

One way to check and make sure that your Web server is functioning correctly is to use the “nslookup” function to locate secondary Domain Name Server addresses. All of the major operating systems come with the “nslookup” function included to help in network troubleshooting.

What is the difference between primary and secondary DNS?

Primary DNS servers contain all relevant resource records and handle DNS queries for a domain. By contrast, secondary DNS servers contain zone file copies that are read-only, meaning they cannot be modified.

What is the difference between a primary and secondary DNS server?

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The primary DNS server contains a DNS record that has the correct IP address for the hostname. If the primary DNS server is unavailable, the device contacts a secondary DNS server, containing a recent copy of the same DNS records.

Why does my router need a DNS server?

That’s where your router comes in. Many routers will actually set themselves up to be your DNS server. When you make a request for something that the router’s DNS server has never heard of before, it asks your ISP’s DNS server for the answer. In other words, the request gets passed upstream.

How does a secondary DNS server update its DNS records?

It receives an updated version of the copy in an operation called zone transfer. Secondary servers can pass a change request if they wish to update their local copy of the DNS records. Secondary DNS servers are not mandatory—the DNS system can work even if only a primary server is available.

Do I need a second DNS server for internal clients?

The short answer, IMO is that your internal clients should only point at your internal server and nothing else. If you have lots of internal clients you need to setup a second server. Your DNS server should probably be pointed at itself only in the client settings.