Blog: Elian Martínez #14 6to Informática

¿What is a Frame Relay?   Frame Relay (or Frame-mode Bearer Service) is a frame relay communication technique for virtual circuit networks, introduced by the ITU-T from recommendation I.122 of 1988. It consists of a simplified form of technology packet switching that transmits a variety of frame sizes or frames ("frames") for data, perfect for transmitting large amounts of data. The Frame Relay technique is used for a high-speed voice and data transmission service that allows the interconnection of geographically separated local area networks at a lower cost. TYPES OF FRAME-RELAY CONNECTIONS There are two ways to set the VC for operation: A. PVC: Permanent virtual circuit. Virtual circuit that is established permanently. PVCs save bandwidth associated with the establishment and cutting of circuits, if certain virtual circuits must exist at all times. The PVC, permanent virtual circuits, are pre-configured by the communications company and once configured it ...

The translation of the word rack refers to a frame, a frame or structure where we can hang or hold things to have them organized. In computer science, a rack is basically a cabinet with 4 internal metallic profiles that allow us to fix and organize inside the different components of a computer or telecommunications installation, equipment such as servers, switches, sais, storage systems, computers, network systems and telephony, etc. Depending on the nature of the installation, we can find inside one of these cabinets a wide variety of devices with the particularity that all of them have had to be manufactured to be compatible with the standard of 19 inches, which is only a few measures previously defined and that when taken into account both by the manufacturers of Rack cabinets and by the hardware that will go inside, they ensure the compatibility between both. Height and width of a rack A rack unit or simply U is a unit of measure used to describe the height of the e...