Abstract: Methods and apparatus for transferring data according to various aspects of the present invention may operate in conjunction with a computer system configured to connect to a p2p network. The computer may run a p2p communication program that receives a list of content available for download and determines a list of missing content on the computer by comparing the list of content available for download to a list of content previously acquired. Each of the content available for download comprises only a current version of corresponding content available.

Abstract: Methods and apparatus for transferring data according to various aspects of the present invention may operate in conjunction with a computer system configured to connect to a p2p network. The computer may run a p2p communication program that receives a request for content via the p2p network. The computer determines whether to fulfill the request according to various criteria, such as whether the p2p communication program is currently accessing a second content from the p2p network and/or whether the first content is associated with the second content.