McAfee INTERNET SECURITY SUITE 2008 User Manual page 242

240 McAfee Internet Security
plain text
Text that is not encrypted. See also encryption.
plug-in
A small software program that works with a larger program to provide added functionality.
For example, plug-ins permit a Web browser to access and execute files embedded in
HTML documents that are in formats the browser normally would not recognize (for
example, animation, video, and audio files).
pop-ups
Small windows that appear on top of other windows on your computer screens. Pop-up
windows are often used in Web browsers to display advertisements.
POP3
(Post Office Protocol 3) An interface between an e-mail client program and the e-mail
server. Most home users have a POP3 e-mail account, also known as standard e-mail
account.
port
A place where information goes into and/or out of a computer. For example, a
conventional analog modem is connected to a serial port.
potentially unwanted program (PUP)
A program that gathers and transmits personal information without your permission (for
example, spyware and adware).
PPPoE
(Point-to-Point Protocol Over Ethernet) A method of using the Point-to-Point Protocol
(PPP) dial-up protocol with Ethernet as the transport.
protocol
A format (hardware or software) for transmitting data between two devices. Your computer
or device must support the correct protocol if you want to communicate with other
computers.
proxy
A computer (or the software that runs on it) that acts as a barrier between a network and
the Internet by presenting only a single network address to external sites. By representing
all internal computers, the proxy protects network identities while still providing access to
the Internet. See also proxy server.
proxy server
A firewall component that manages Internet traffic to and from a local area network (LAN).
A proxy server can improve performance by supplying frequently requested data, such as a
popular Web page, and can filter and discard requests that the owner does not consider
appropriate, such as requests for unauthorized access to proprietary files.