Name Server Question

[Ray]

Ok.. here is my problem. Say i have a site on two different servers, and in the domain ns, i have the ns ns.ddddd.com and for the second one ns.gggg.com. Now say that ddddd.com's server were to go down, would the second nameserver come into action and bring it to the other server (gggg.com

 

[Rudy]

Yes, that is correct.

That is exactally why domain registrars require you to have at least 2 name servers listed.

Now, lets say you had 3 Name Servers listed, and the first two went down, then the 3rd server would pick it up automatically. Make sense?

 

[dongan]

But, you have 99.9% uptime in the first server itself. For reliability, they provide the second one.

 

[AdoptableDomains]

Often, the second nameserver also kicks in not just if the server goes down, but if traffic gets high and it's busy (load balancing). Sometimes they are in different locations as well, so that a catastrophe won't take both out at the same time. One may be in a datacenter on the east coast and another on the west coast.

BTW, most people usually configure their routers to use the DNS severs of their ISP since it's the fewest hops. Sometimes you can set your own computer/router to use your own DNS servers instead (usually temporarily), which can take some time out of the propagation process when DNS changes are made or started.