This is one of the most commonly encountered open group architecture framework interview questions. In the advanced TOGAF interview questions, you will encounter deeper questions relating to TOGAF frameworks. You may be asked to define various jargon or models to help the interviewer gain insight into your understanding of TOGAF at an advanced level.  You can start by stating, "TOGAF provides two reference models." But before that, know what a reference model is. A reference model lists common vocabulary terms, designs, standards, and architectural principles. The models are,  The Integrated Information Infrastructure Reference Model  The TOGAF Technical Reference Model  The TOGAF TRM is a reference model which stands for Technical Reference Model. It gives a reference to platform services and elements. TRM will ensure that business architectures are generated consistently based on the set goals. The integrated information infrastructure reference model is a subset of the TOGAF TRM. It consists of two components- a taxonomy that gives a cohesive description of an integrated data infrastructure's elements and conceptual framework, defines terminology, and does so. An accompanying III-RM graphic that serves as a visual tool for understanding the taxonomy and the relationships between the components.