Remote Direct Memory Access (RDMA) is a technology that allows servers on a network to exchange data in main memory, bypassing the operating system and the CPU resources. It enables direct transfer of data in and out of a server by implementing a transport protocol on the NICs. The technology uses zero-copy networking to read data directly from the main memory of one system and write that data directly to the main memory of another system. This improves performance and throughput by freeing up server resources. It has proven useful in applications that require fast and massively parallel high-performance computing (HPC) clusters and data center networks.