The level of delivery service guaranteed by a network with regard to bandwidth, latency, and frequency of access to media. QoS is usually applied via a system of traffic classification, frame/packet marking, and input/output queuing in switches or routers.
Redundant Array of Inexpensive Disks (RAID)
A technology for mirroring or striping data across a set of disks. Striping can be done with or without the generation of parity data.
Remote Direct Memory Access (RDMA)
A method by which an application on a host can directly access a memory address on another host. RDMA is often used in clustering environments to improve the performance of cooperating applications.
Remote-Procedure Call (RPC)
An application layer protocol used by NFS for invocation of procedures implemented on remote hosts.
repeater
A device that terminates an OSI physical layer transmission, interprets the digitally encoded signal, regenerates the signal, and retransmits the signal on a different link than whence it was received.
Resilient Packet Ring (RPR)
A class of data-link layer metropolitan area transport technologies that combine characteristics of TDM-based optical rings with LAN technologies.
router
A device that operates at the OSI network layer to connect two data-link layer networks. A router can forward or filter packets. Routers typically employ advanced intelligence for processing packets.
routing
The combined act of making forwarding decisions based on OSI Layer 3 information and forwarding packets.
