Glossary
145
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.