There are many different types of connectors that can be used with fiber optic cabling, but the most common ones are LC (Lucent Connector), ST (Straight Tip), and SC (Subscriber Connector). LC connectors are the most popular type of connector for fiber optic cabling, as they offer a high degree of compatibility with different types of optical fibers. ST and SC connectors are also commonly used, but they are not as widely compatible with different types of optical fibers.