- Can I have multiple DNS servers?
- Why do I have 2 DNS servers?
- How many primary DNS servers are there?
- Can a DNS server be primary and secondary for the same zone?
- Can multiple DNS servers be configured using Active Directory?
- Why would you activate more than one NIC?
- What is default gateway IP?
- How many name servers should be visited?
- Do I need a secondary DNS server?
- What is DNS primary zone?
- Is Primary DNS the same as IP address?
- What is the difference between primary and secondary DNS?
- What is the primary DNS of my router?
- What happens if primary DNS down?
- What primary DNS should I use?
The theory of having more than one is simply that if the Primary DNS is off line, your system can query the secondary DNS server.
Primary and secondary (and other) DNS servers are supposed to be on separate networks, if one link is down, the second link will be up.
There are a number of problems with this in practice.
Can I have multiple 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.
Why do I have 2 DNS servers?
The DNS requires that all zones be redundantly supported by more than one name server. Designated secondary servers can acquire zones and check for updates from the primary server using the zone transfer protocol of the DNS. The backup DNS servers (one or more) will be slaves to your primary DNS server.
How many primary DNS servers are there?
13 DNS servers
Can a DNS server be primary and secondary for the same zone?
Only one DNS server should be configured as primary for a zone, but you can have any number of secondary servers for redundancy. Both primary and secondary servers for a zone serve exactly the same data to clients. Because of this you could easily “simulate” a secondary server on a single computer with 2 IP addresses.
Can multiple DNS servers be configured using Active Directory?
To make the deployment of multiple DNS servers easier you should use Active Directory integrated zones. You can only use AD integrated zones if you have DNS configured on your domain controllers. Security: If you enable secure dynamic updates, then only authorized clients can update their records in DNS zones.
Why would you activate more than one NIC?
If a NIC fails, it could potentially sever an important connection. One way to lessen the potential for these problems is to install two or more NICs in network servers. Using multiple NICs offers these key benefits: Load balancing.
What is default gateway IP?
Ad. In the networking world, a default gateway is an IP address that traffic gets sent to when it’s bound for a destination outside the current network. On most home and small business networks—where you have a single router and several connected devices—the router’s private IP address is the default gateway.
How many name servers should be visited?
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.
Do I need a secondary DNS server?
A DNS server can be primary for one zone (domain) and secondary for another. The DNS specifications (RFCs) require that each domain name is served by at least 2 DNS server for redundancy. Only one DNS server should be configured as primary for a zone, but you can have any number of secondary servers for redundancy.
What is DNS primary zone?
Primary DNS Zone: A Primary DNS zone is the original Read-Write Authoritative DNS zone of portion of a DNS Namespace. When a DNS Server hosts a primary zone, that DNS Server is considered as the Authoritative DNS Server and it is the primary source for information of that zone.
Is Primary DNS the same as IP address?
An IP address is an address assigned to any computer (including servers) to identify it on a given network. A DNS address is a Domain Name Service which is used to convert alphabetic references into a server’s IP address generally for hosting services. An example of a DNS name is “ns1.godaddy.com”.
What is the difference between primary and secondary DNS?
Primary servers get this information directly from local files. Secondary servers contain read-only copies of the zone file, and they get their info from a primary server in a communication known as a zone transfer. Each zone can only have one primary DNS server, but it can have any number of secondary DNS servers.
What is the primary DNS of my router?
Look at the IP Address field to identify your IP address; the first number in the DNS Servers field is your primary DNS; and the Default Gateway field lists the current default router address used to connect your computer to the Internet.
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.
What primary DNS should I use?
Public DNS Servers
Personally, I prefer OpenDNS (208.67. 220.220 and 208.67. 222.222) and Google Public DNS (8.8. 8.8 and 8.8.