I want to know the answer to the following question:
How many types of charging ports exist?
All the background I'm provided with is that "A portable device can recognize the type of USB port; on a dedicated charging port, the D+ and D− pins are shorted with a resistance not exceeding 200 ohms, while charging downstream ports provide additional detection logic so their presence can be determined by attached devices.". Is that enough to answer the question?
Answer: no