CREST Practitioner Security Analyst (CPSA) 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer is that IR stands for Internet Relay. This term is associated with technologies and protocols that facilitate communication over the internet, particularly in the context of real-time messaging and chat systems. The Internet Relay Chat (IRC) is a prime example, enabling users to communicate in channels or private messages, thus illustrating the essence of "relay" in the networking domain.

The other options, while related to various aspects of networking, do not represent widely recognized definitions for the acronym IR in the context of established network terminology. Internal Routing refers to the mechanisms used within a network to direct traffic between devices but lacks the specific relation to the term “relay.” Similarly, Intranet Relay suggests a local network application without the broader internet context, and Internet Resource generally refers to any entity available on the internet but does not encapsulate the concept of relaying messages or information.