RA - ✔✔A registration authority (RA) is an authority in a network that verifies user
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requests for a digital certificate and tells the certificate authority (CA) to issue it.
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RADIUS - ✔✔Remote Authentication Dial-In User Service) is a client-server protocol and
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software that enables remote access servers to communicate with a central server to
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authenticate dial-in users and authorize their access to the requested system or service.
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RAID - ✔✔(redundant array of independent disks) is a way of storing the same data in
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different places on multiple hard disks or solid-state drives (SSDs) to protect data in the case
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of a drive failure. There are different RAID levels, however, and not all have the goal of
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providing redundancy. ||
RDP - ✔✔Remote Desktop Protocol (RDP) provides remote display and input capabilities
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over network connections for Windows-based applications running on a server.
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RF - ✔✔radio frequency (RF) networks. A radio frequency signal is the wireless
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electromagnetic signal that extends across an area that carriers use as a form of || || || || || || || || || || || || || ||
communication
RFC - ✔✔stands for Request For Comments) is a document that describes the standards,
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protocols, and technologies of the Internet and TCP/IP. || || || || || || ||
RG - ✔✔Radio Guide, a U.S. Army specification for grades of transmission lines. RG
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specifications refer to forms of coaxial cable used in networking, as in the following || || || || || || || || || || || || || ||
examples: RG-8: Also known as N series cable, which is a coaxial cable with an impedance
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of 52 ohms
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