These cards are issued by a state or country in which medical cannabis is recognized. Typically a patient is required to pay a fee to the state in order to obtain a medical marijuana card. In most states with medical marijuana card programs, the card is valid for up to 12 months and may be renewed.
Alternatively referred to as a ring network, ring topology is a computer network configuration where the devices are connected to each other in a circular shape. Each packet is sent around the ring until it reaches its final destination.
Topology > Point-Set Topology >. MathWorld Contributors > Budney >. The low-level language of topology, which is not really considered a separate branch of topology. Point-set topology, also called set-theoretic topology or general topology, is the study of the general abstract nature of continuity or closeness on spaces. Basic point-set topological notions are ones like continuity, dimension, compactness, and connectedness.