Ans: i. Inside out tracking: This method makes use of cameras in the headset for tracking movement from within the headset. The physical motion around the person can be monitored through the Advanced simultaneous location and mapping (“SLAM”) algorithms. This type of tracking can work easily without set up or mounting hardware. ii. Outside in tracking: It makes use of the hardware present outside in the tracked space. This hardware is sometimes known as "lighthouses" in certain models and is in the form of small black boxes mounted in the room corners. This type of tracking can be extensible to fill the gaps in head-mounted hardware.