Glossary323GlossaryPRN fileAn interface for a device driver, this allows software to interact with the devicedriver using standard input/output system calls, which simplifies many tasks.ProtocolA convention or standard that controls or enables the connection,communication, and data transfer between two computing endpoints.PSSee PostScript.PSTNThe Public-Switched Telephone Network (PSTN) is the network of the world'spublic circuit-switched telephone networks which, on industrial premises, isusually routed through the switchboard.RADIUSRemote Authentication Dial In User Service (RADIUS) is a protocol for remoteuser authentication and accounting. RADIUS enables centralized managementof authentication data such as usernames and passwords using an AAA(authentication, authorization, and accounting) concept to manage networkaccess.ResolutionThe sharpness of an image, measured in Dots Per Inch (DPI). The higher the dpi,the greater the resolution.SMBServer Message Block (SMB) is a network protocol mainly applied to share files,printers, serial ports, and miscellaneous communications between nodes on anetwork. It also provides an authenticated Inter-process communicationmechanism.
