The document discusses Remote Direct Memory Access (RDMA) over IP as a way to avoid data copying and reduce host processing overhead for high-speed data transfers. It proposes an architecture with two layers - Direct Data Placement (DDP) and RDMA control - running over IP transports. RDMA over IP aims to make network I/O "free" by allowing the network adapter to directly place data into application buffers without involving the host CPU. This could improve throughput and allow more machines to be supported for high-bandwidth data center applications. Open issues that still need to be addressed include security, interaction with TCP, atomic operations, and impact on network behaviors.