R - Definitions
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R
radio access network (RAN)
A radio access network (RAN) is a major component of a wireless telecommunications system that connects individual devices to other parts of a network through a radio link.
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radio frequency (RF, rf)
Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging from 300 GHz to as low as 9 kHz.
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Real-time Transport Protocol (RTP)
Real-time Transport Protocol (RTP) is a network standard designed for transmitting audio or video data that is optimized for consistent delivery of live data.
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remote infrastructure management
Remote infrastructure management, or RIM, is a comprehensive approach to handling and overseeing an organization's IT infrastructure, systems and services from a remote location.
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Reverse Address Resolution Protocol (RARP)
Reverse Address Resolution Protocol (RARP) is a protocol a physical machine in a local area network (LAN) can use to request its IP address.
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ROADM (reconfigurable optical add-drop multiplexer)
An ROADM (reconfigurable optical add-drop multiplexer) is a device that can add, block, pass or redirect modulated infrared (IR) and visible light beams of various wavelengths in a fiber optic network. ... (Continued)
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route summarization (route aggregation)
Route summarization -- also known as route aggregation -- is a method to minimize the number of routing tables in an Internet Protocol (IP) network.
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router
A router is a physical or virtual appliance that passes information between two or more packet-switched computer networks.
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Routing Information Protocol (RIP)
Routing Information Protocol (RIP) is a distance vector protocol that uses hop count as its primary metric.
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routing table
A routing table is a set of rules, often viewed in table format, that's used to determine where data packets traveling over an Internet Protocol (IP) network will be directed.
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RS-232C
RS-232C is one of the earlier versions of the long-established standard RS-232, which defines a physical interface for relatively low-speed serial data communication between computers and related devices.
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runbook
Runbooks are a set of standardized written procedures for completing repetitive IT processes within a company.