There also are tools that perform a UDP or TCP port check for response time measurements, but they won’t actually perform a DNS lookup.

Network analysts typically test name servers using ping to confirm a server is up and the network isn’t slow, or use Nslookup-type utilities to prove a DNS server is resolving names to IP addresses. Performance problems associated with name servers include overloaded servers, packet loss, and misconfigured clients. Windows Internet Name Service (WINS), Lightweight Directory Access Protocol (LDAP), and Domain Name Service are the most common name servers in the corporate environment. If you ran Namebench, after various tests, it shows recommended configuration, including Primary DNS server, Secondary and Territory DNS server which is best for your PC.When troubleshooting application performance issues, network analysts might overlook name servers. Namebench is a free tool that searches for fastest DNS servers available to your computer using your browser history, tcpdump output or using standardized datasets.

Norton ConnectSafe: Free Norton DNS Service Blocks Access to Inappropriate and Unsafe websites.

OpenDNS to become ad-free, Guide is going away on June 6th.

OpenDNS is one DNS service that filters malicious websites. It is true that you are connected openly to the Internet, you have to secure your computer by using anti-virus software. Some websites may not load properly, it’s good to always revert back to default DNS service provider when that happens. The problem with changing your DNS server provided by an ISP can be unexpected. The good news is that along with Google Public DNS resolver, Google also released a tool named Namebench, an open DNS benchmark utility, which hunts for fastest DNS servers for your computer, and also shows recommended fastest and nearest DNS Servers available for you. Most fall into a dilemma whether to shift to Google DNS or use the Default DNS provided by their ISP?. A Lot of users may get confused with Internet giant, Google claiming Google DNS Server offers much improved speed for the internet.

Google dns benchmark utility