What is a domain name?

A domain name functions as a unique address that identifies a specific website on the Internet. It serves as a human-readable identifier that allows users to easily access a website without needing to memorize a numerical IP address. For example, in the web address "www.example.com," "example.com" is the domain name, and it helps redirect users to the correct server where the website's content is hosted.

This concept is fundamental to navigating the web, as domain names enable users to find and connect to websites efficiently. The domain name system (DNS) translates these human-friendly names into numerical IP addresses, simplifying the browsing experience.

The other choices lack the defining characteristics of a domain name. A type of server hosting websites refers to the physical or virtual infrastructure needed to store and serve website content, while a tool for managing website content pertains to software or applications used for content management. A protocol for securing web transactions describes a set of rules for ensuring secure communications over the Internet, such as SSL or HTTPS, which does not relate to the identification of a website.