Which of the following materials is typically around the core and cladding?

The primary buffer coating serves an essential protective role around the core and cladding of a fiber optic cable. This layer is designed to protect the delicate optical fibers from environmental factors, mechanical stress, and moisture, ensuring the integrity of the light transmission. The primary buffer coating maintains consistent performance by providing stability and reducing the risk of damage during installation or handling.

In contrast, the outer jacket, while also a protective layer, is positioned outside any buffer coatings and is mainly meant to protect against environmental hazards. The sheath material refers to the overall external layer that covers and protects the entire cable assembly but does not encase the core and cladding specifically. Lastly, connector material pertains to the components used at the ends of the fiber optic cables to facilitate connections and is not involved in the direct protection of the fiber's core or cladding.

Therefore, recognizing the primary buffer coating's specific protective role helps distinguish it as the correct answer among the options provided.