Concerned about high speed internet connection



I am going to switch from PC to Mac in the near future, my main concern is high speed internet. I currently have Comcast Broadband with a high speed modem. When I get an Imac, will I need to buy another high speed modem?
If so, what is the best kind to buy?

Shop Amazon

Shop for your Apple, Mac, iPhone and other computer products on Amazon.
We are a participant in the Amazon Services LLC Associates Program, an affiliate program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.