Today, we did a review of Networking concepts. We also did a practice A+ test with Alex where everyone got a chance to figure out or guess multiple choice type hardware questions. It was a collaborative effort and we got a 100% in the test. The review refreshed the different concepts that was discussed and that we hopefully during the past months. The 7 Layer OSI (Open Systems Interconnect) model was introduced comprised of the Application, Presentation, Session, Transport, Network, Data and Physical layers.