What are the main types of rice cakes used in Korean cuisine, and how are they typically served?

In Korean cuisine, key rice cakes include:
1. Tteokbokki: Chewy rice cakes in a spicy-sweet sauce, served as a popular snack or street food.
2. Songpyeon: Half-moon shaped rice cakes filled with sweetened red bean paste or other fillings, served during Chuseok or celebrations.
3. Baekseolgi: Steamed white rice cakes, typically served plain for celebrations like birthdays and weddings.
4. Jeolpyeon: Sliced rice cakes often covered with powdered soybean, served as a snack or dessert.
5. Injeolmi: Rice cakes coated in powdered soybean flour, enjoyed as a snack or dessert.
6. Bukkumi: Pan-fried rice cakes stuffed with sweet or savory fillings, often served as a snack.