Glossary  

PRN file 

An interface for a device driver, this allows software to interact with the device driver 

using standard input/output system calls, which simplifies many tasks. 

Protocol 

A convention or standard that controls or enables the connection, communication, 

and data transfer between two computing endpoints. 

PS 

See PostScript. 

PSTN 

The Public-Switched Telephone Network (PSTN) is the network of the world's public 

circuit-switched telephone networks which, on industrial premises, is usually routed 

through the switchboard. 

RADIUS 

Remote Authentication Dial In User Service (RADIUS) is a protocol for remote user 

authentication and accounting. RADIUS enables centralized management of 

authentication data such as usernames and passwords using an AAA 

(authentication, authorization, and accounting) concept to manage network access. 

Resolution 

The sharpness of an image, measured in Dots Per Inch (DPI). The higher the dpi, the 

greater the resolution. 

SMB 

Server Message Block (SMB) is a network protocol mainly applied to share files, 

printers, serial ports, and miscellaneous communications between nodes on a 

network. It also provides an authenticated Inter-process communication 

mechanism. 

SMTP 

Simple Mail Transfer Protocol (SMTP) is the standard for e-mail transmissions across 

the Internet. SMTP is a relatively simple, text-based protocol, where one or more 

recipients of a message are specified, and then the message text is transferred. It is a 

client-server protocol, where the client transmits an email message to the server. 

SSID 

Service Set Identifier (SSID) is a name of a wireless local area network (WLAN). All  

wireless devices in a WLAN use the same SSID in order to communicate with each  

other. The SSIDs are case-sensitive and have a maximum length of 32 characters.  

Glossary 

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