Blocking of external files containing specific content is known as what?

Blocking of external files containing specific content is primarily referred to as content filtering. Content filters are designed to examine incoming data, such as emails or web pages, to identify and prevent the transmission of content that violates specific criteria or policies. This involves scanning for keywords, file types, or other identifiable markers to ensure that potentially harmful or inappropriate content does not pass through the network.

Content filtering is widely used in organizational networks to protect users from exposure to malware and other harmful content, as well as to enforce compliance with regulations and company policies. This functionality is especially crucial in environments where sensitive data and user safety are paramount.

Other terms in the options provided have different focuses. Data Loss Prevention refers to broader strategies and technologies aimed at preventing data breaches and ensuring that sensitive information is not lost or improperly accessed, rather than specifically filtering content based on its nature. Pop-up blockers specifically address the blocking of intrusive advertisements that appear in new browser windows, and Intrusion Detection Systems primarily monitor network traffic for suspicious activity rather than filtering external content based on specified criteria.