The ST to SC connector is a type of fiber optic connector used to connect two fiber optic cables. It is a type of physical contact (PC) connector, which means that the two fibers are held in place by a spring-loaded mechanism. The ST connector is a bayonet-style connector, which means that it is inserted into the port and twisted to lock it in place. The SC connector is a push-pull style connector, which means that it is inserted into the port and then pulled back to lock it in place. Both connectors are designed to provide a secure connection and are commonly used in fiber optic networks.