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Common DDoS Attacks
DDoS Attack Tools
DDoS Glossary of Terms


Learning Objectives

After reading this article you will be able to:

  • Define DNS

What is DNS?

Domain Name System (DNS) servers are the “phonebooks” of the Internet; they are the path through which Internet devices are able to lookup other devices in order to access internet content. These servers maintain a directory of easy to remember domain names ( and transfer those names into the machine-friendly internet protocol (IP) addresses ( that computers use to connect to each other.

For example, when a domain name is entered into a web browser, a DNS server is contacted, starting a process which ultimately returns the IP address of the target website to the browser.