Which of the following best describes a URL?

A URL, or Uniform Resource Locator, serves as a web address that specifically identifies a resource on the internet. It provides the means to locate a resource and enables browsers to retrieve web pages, videos, images, and other online content. For instance, a URL like "https://www.example.com" not only indicates that the resource is accessible using the HTTPS protocol but also leads to a specific webpage located at "www.example.com."

In contrast, the other choices do not encapsulate the essence of what a URL represents. While a protocol for transferring files is certainly related to how data is transmitted over the internet, it does not define a URL itself. Malware refers to malicious software designed to harm or exploit devices, and is unrelated to URLs. Lastly, a method of encryption pertains to securing data to prevent unauthorized access but does not describe the function or nature of a URL. Thus, the description of a URL as a web address best captures its primary function in the digital landscape.