David J Taylor wrote: > Martin Burnicki wrote: >> David J Taylor wrote: >>> Martin Burnicki wrote: >>>> However, if several local subnets needed to resolve "microsoft.com" >>>> then each one would have to ask the root servers the first time. >>> Wouldn't you have one or two central DNS servers for both subnets? >> Sorry, I've been not specific enough here. >> >> I meant e.g. several companies who have their own local subnets and >> local DNS servers. >> >> If they don't use their ISP's servers then the local DNS server in >> every company would contact the root DNS servers directly. >> >> If they used their ISP's DNS servers then all customers of the same >> ISP simply get the cached results for popular domains without having >> to contact the root servers. >> >> Of cause all of this discussion is based on assumptions, how much >> traffic and load on the root servers would differ if people used them >> rather then their ISP's servers. >> >> >> Martin > > Martin, > > When I was involved in this, some years ago now, each site had its own DNS > servers, and those spoke to a central company-wide DNS server. The > connection to the ISP was central, and not per-site. > > I suppose that, like NTP, DNS should be configured to best suit local > needs, and try to place minimum load on central servers, although the > requirements and resulting configuration may be different. >
You can't actually accomplish that, you just increase the load on the ISP's servers. Danny > Cheers, > David -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
