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Questions on DNS Zone, What's TTL ??
Mahfuz_SS_EHL
Host Rep, Veteran
Hi,
In the DNS Zone, If I add two IPv4 to a Specific HostName, which it will point to ?? Let Me make it clear.
Suppose, I have a domain name abcd.com.
I created a Sub-Domain (sub.abcd.com), It's not like Sub-Domain but I've created 2 Zones like this & if I point sub.abcd.com to:
sub.abcd.com => 1.2.3.4 sub.abcd.com => 5.6.7.8
Then, to which IPv4 sub.abcd.com will point ?? [I heard that it depends on the visitor, low latency/routing will be preferred]
If I want that firstly, it will try to connect to 1.2.3.4 and if it doesn't get any response it'll later connect to 5.6.7.8 or Vice-Versa, then what's the process of doing this ??
I saw Something TTL (Time to Live) in DNS Zone. What's it & what are it's usage? Does it have any impact on the above?? Like, if I set TTL to 1 or 2 seconds ??
Regards,
Mahfuz.
Comments
3) TTL is time to live, basically it controls how often DNS servers will check with the authoritative nameserver to see if its changed.
From what you have described you want to look at DNS that supports failover; Rage4 from @gbshouse does.