Context: Originally, a FireWire connection to the host computer was used to update songs or recharge the battery. The battery could also be charged with a power adapter that was included with the first four generations.

Question: What was the first type of connection used by the iPod to charge and transfer files?
Answer: FireWire

Question: What was an alternate method of charging the iPod?
Answer: power adapter

Question: What type of connector was originally required to upload songs or recharge the iPod?
Answer: FireWire