1.4 Relationship to Other Protocols

The client's connection to a hosted cache uses the Hypertext Transfer Protocol over Secure Sockets Layer (HTTPS) ([RFC2818]) or the Hypertext Transfer Protocol (HTTP) ([RFC2616]) as a transport. The content encoding used when the client offers the segment and associated blocks to the hosted cache follows the format specified in the Peer Content Caching and Retrieval: Retrieval Protocol (PCCRR) [MS-PCCRR].

The hosted cache uses the PCCRR framework as a client-role peer to retrieve the blocks from the peer that is offering them.