When you enter a Web address into your browser, one of the first things your PC does is contact a domain name server to get routing information for the address. In most cases your PC sends DNS ...

If you're troubleshooting some network problems in your office and some computers are connected to a router, you may need the IP address of each computer, its primary DNS server and the default router ...

Amazon Web Services, hosted in data centers like this one in Virginia, supports thousands of websites, apps and online services – but not during its recent DNS outage. Nathan Howard/Getty Images When ...