How are MAC addresses learned and associated with the port?

Switches learn MAC addresses by inspecting the frame's source MAC address on the incoming port. They then associate the source MAC address with the port it came in on. The destination MAC address is what the forward/filter decisions are based upon. Spanning Tree Protocol (STP) listens and learns Bridge Protocol Data Units (BPDUs) so it can detect loops or potential loops. Frame type learning is not a real concept; therefore, it is an invalid answer.