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Glossary IP Solutions
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Real Time Describes an event or process that is currently taking place. A good example of real time is this: When you’re talking on the telephone to someone, you’re talking in real time. When you leave a message on someone’s answering machine and that person hears the message later, that person is not hearing your message in real time.

Refresh Rate Describes how many times per second the image is refreshed, or redrawn, on the screen. The faster the refresh rate, the fewer flickers you see on screen. The default setting for most monitors is 60 Hz, but you should use 75 to 85 Hz to reduce flicker and eyestrain.

Remote Access Refers to the process of attaching to a network from another location and accessing resources from the remote computer.

Remote Administration Enabling remote administration allows a user to create, change, and monitor shares on your computer. Windows lets you assign a password to this permission so that only a person who knows the password can perform these tasks. The person who knows the password can monitor the workstations from any computer on the network.

Remote File Transfer Another common method of remote access is file transfer. File transfer involves uploading a file to or downloading a file from the remote computer.

Repeater A network device that boosts and amplifies an analog signal in the network.

Resolution Describes the number of pixels a device such as a scanner or printer applies to an image. Resolution is measured by a grid, such as 300-300 pixels (or dots) per square inch. The higher the resolution, the better the image output and the more expensive the scanner.

RJ-11 A four-wire connector used to join a telephone line to a wall plate or a communication peripheral, such as a modem.

RJ-45 An eight-wire connector used to join twisted-pair networking cable.

ROM (Read-Only Memory) A chip that permanently stores data, also called firmware.

Router A network device that connects two or more network segments; a router then can choose the best way for network packets to travel the network to arrive quickly and efficiently at their destination.

RS-232 A serial connection port on a PC, used for connecting a mouse, printer, modem, or other device.

RS-232 Cable This cable transmits data at about a 20 Kpbs. A serial cable generally used for connecting a computer to a peripheral device, the RS-232 has a maximum cable limit of 15 meters, or about 50 feet. Used for Direct Cable Connection in Windows.

RS-485 RS-485 is a serial connection port that enables you to connect from 10 to 32 devices.

Script Files A script (unlike a program) is a file of commands based on a particuler language that executes in a liner fashon. Lua, Perl, Ruby, PHP are all considered scripting languages.

Serial Port A serial port transmits data a bit more slowly than parallel ports, one bit at a time. Serial Cables transmit data sequentially over only one pair of wires. Since parallel cables transmit data simultaneously over multiple lines, parallel is the faster of the two connection methods. A serial port is also a COM port.