The most common form of name resolution is that hostname resolution that comprises of a database of hostnames to IP addresses called DNS that uses a flat file called the hosts file:

  • Domain Name System (DNS): A hierarchical naming system that takes a hostname and resolves it to an IP address. Just think what it would be like if you wanted to go to a website and you had to remember an IP address—you would have a list on your computer of the names and IP address, as we don't remember number as easily as we remember names. If I want to go to the Microsoft website, I know that I need to enter in my web browser and it will take me there. If I have a user called Ian in a domain called, the hostname portion ...

Get CompTIA Security+ Certification Guide now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.