What are the four types of passive filters as based upon their frequency response?

What are the four types of passive filters as based upon their frequency response? I know their is passive low pass filters, passive high pass filters, passive band pass filters and band stop filters. I am unsure of their frequency responses, and if band stop is the fourth passive filter?

What is meant by the -3 dB half-power point of a filter?

What is the difference between a RLC bandpass filter and a RLC bandstop filter?

Thank you so much for your help, very much appreciated. Have a great day!