What are the 2 main parts of a medieval castle gatehouse?

The two main parts of a medieval castle gatehouse are the outer gate and the inner gate. The outer gate typically features heavy doors and may include a drawbridge or portcullis for added security, while the inner gate serves as an additional layer of protection and often includes defensive features like arrow slits or murder holes. Together, these components provided a formidable defense against attackers while controlling access to the castle.