Axram - R


Radio Frequency Interference. (RFI) Computers, like other electronic devices, must be constructed so as not to allow the emission of frequencies hat might cause interference with radio or television reception. Good design can minimize the problem, but you will often see additional metal shielding inside a computer or the use of a metal case. Conversely, RFI generated from any nearby frequency-emitting sources such as radio or TV transmitters or CB radios can sometimes cause problems with a computer.
RAID. Redundant Array of Independent (or Inexpensive) Disks. A category of disk drives that employ two or more drives in combination for fault tolerance and performance. RAID disk drives are used frequently on servers but aren’t generally necessary for personal computers. There are a number of different RAID levels, the best results in excellent performance and good fault tolerance - one of the hard drives can fail with no loss of data.
RAM. Acronym for Random-Access Memory. The computer’s main memory where programs and data are stored (they can be written to and read from) while the program is running. Information stored in RAM is lost when the computer is turned off.
Random access. The ability to access any piece of information from a storage medium, such as a disk or RAM. The idea here is that random access gives you the ability to access any information without having to read everything the comes before it.
RAS Remote access service. Also known as Dial-Up Networking, it provides remote access to networks. Dial-Up Networking allows a remote user to access his network. Once connected, it is as if the remote computer is logically on the network; the user can do anything that he could do when physically connected to the network.
Remote attack. An attack that targets a computer other than the one that the attacker is interactively logged on to. For example, an attacker can log on to a workstation and attack a server on the same network or on an entirely different one.
Remote procedure call (RPC). A communication mechanism that allows computers to communicate with one another over a network. An RPC consists of a procedure identifier, parameters passed to the procedure, and a value returned to the caller (client computer) after the procedure has executed on the remote system (server computer).
Rootkit. A root kit is a set of tools used by an intruder after cracking a computer system. These tools can help the attacker maintain his or her access to the system and use it for malicious purposes. Root kits exist for a variety of operating systems such as Linux, Solaris, and versions of Microsoft Windows.

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