Among the options are the fourth and sixth version of the protocol. Most Internet service providers (ISPs) run their own DNS servers that get their information from the 13 root servers, so there’s always a delay when keeping them all in sync. Let's start off. Just as it is possible that your local PC has network info (including DNS server IP Addresses), it is also possible that your router has bad info. http://pseudoblog.net/dns-server/dns-related-errors.html
Even if you don't recall adding listings to a HOSTS file, it still might contain listings, because some Internet accelerator utilities edit them without telling you. These features can cause some differences for DNS server defaults—when the DNS database is directory-integrated—that differ from the DNS server defaults that are used with traditional file-based storage. Wait for the command to process and then restart your computer. Montreal sees its future in smart sensors, A.I. (+ video) Partnerships with a vibrant startup community help Montreal retain its top “intelligent” ranking.