Which of the following is NOT a characteristic of the Surface web?

The Surface web is characterized by its accessibility and visibility to the general public, primarily facilitated through search engines. Websites that comprise the Surface web are indexed by search engines, which allows users to find them easily by entering relevant search terms. This includes a vast array of content that is available publicly, meaning it can be accessed without special permissions or tools.

The correct answer highlights that the Surface web does not contain unlisted websites. Unlisted websites, often referred to as those on the Deep web, are not indexed by search engines and are therefore not part of what the Surface web comprises. Accessing these sites typically requires specific credentials or direct knowledge of the web address, which is not the case for Surface web content. Thus, understanding the characteristics of the Surface web versus other areas of the internet reinforces the fundamental categories within web architecture and helps clarify what constitutes public web content.