1.6 Applicability Statement
Because the BITS Peer-Caching: Content Retrieval Protocol uses unicast communication to poll multiple servers for content, it is best suited for situations in which the client is connected to the servers by a high-speed network.
The BITS Peer-Caching: Content Retrieval Protocol is more complex than the standard HTTP proxy behavior specified in [RFC2616] section 8.1.3, but the protocol does not require the server to download data on the client's behalf. The BITS Peer-Caching: Content Retrieval Protocol is best suited to a peer-to-peer environment in which the client can choose among several servers based on connection speed, authentication decisions, and other factors. Refer to section 18.104.22.168.2 for details on the algorithm used to select servers.