Certification authority.

An installation s passive communications elements (for example, optical fiber, twisted pair, coaxial cable, connectors, or splices) between transmitters and receivers.

High-speed memory or storage device used to reduce effective time required to read data from or write data to a lower-speed memory or storage device. Read cache holds data in anticipation that they will be requested; Write cache holds data written by a client until they can be stored safely on more of a permanent storage medium such as a disk or tape.

Enclosure for a single disk or tape usually designed to mount in shelves that supply power, cooling, and I/O bus services to devices. Canisters minimize radiofrequency emissions and simplify insertion and removal of devices in multidevice storage subsystems.

Medium that handles a robot in which the medium is stored and selected from a rotating wheel

Physical layer data transmission protocol used in Ethernet and Fast Ethernet networks. Carrier sense refers to arbitration for shared links. Unlike always on physical protocols, Carrier Sense Protocols require a node wanting to transmit to wait for the absence of a carrier (indicating that another node is transmitting) on the link. Multiple access refers to the party-line nature of a link; a large number of nodes (up to 500 with Ethernet) share access to a single link. Collision detection refers to the possibility that two nodes will simultaneously sense an...