RAID (Redundant Array of Independent Drives)
Redundant Array of Independent Drives (or Disks), also known as Redundant Array of Inexpensive Drives (or Disks) is an umbrella term for data storage schemes that divide and/or replicate data among multiple hard drives. They offer, depending on the scheme, increased data reliability and/or I/O performance.
RAM (Random Access Memory)
Random access memory (usually known by its acronym, RAM) is a type of data storage used in computers. It takes the form of integrated circuits that allow the stored data to be accessed in any order — that is, at random and without the physical movement of the storage medium or a physical reading head. The word "random" refers to the fact that any piece of data can be returned quickly, and in a constant time, regardless of its physical location and whether or not it is related to the previous piece of data. This contrasts with storage mechanisms such as tapes, magnetic discs and optical discs, which rely on the physical movement of the recording medium or a reading head. In these devices, the movement takes longer than the data transfer, and the retrieval time varies depending on the physical location of the next item.
RDBMS (Relational Database Management System)
A relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model. Relational databases are the most common kind of database in use today (assuming one does not count a file system as a database).[citation needed]A short definition of a RDBMS may be a DBMS in which data is stored in the form of tables and the relationship among the data is also stored in the form of tables
RDP (Remote Desktop Protocol)
Remote Desktop Protocol (RDP) is a multi-channel protocol that allows a user to connect to a computer running Microsoft Terminal Services. Clients exist for most versions of Windows (including handheld versions), and other operating systems such as Linux, FreeBSD, Solaris and Mac OS X. The server listens by default on TCP port 3389. Microsoft refers to the official RDP client software as either Remote Desktop Connection (RDC) or Terminal Services Client (TSC).
Router
A router is a computer networking device that buffers and forwards data packets across an inter-network toward their destinations, through a process known as routing.
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