Operating instructions
physical address Defines a specific machine without any reference to its lo
-
cation or network. A MAC address is an example of a physical address.
pin 1 A designator used to ensure proper alignment of floppy disk drive and
hard drive connectors.
ping (packet Internet groper) Slang term for a small network message (ICMP
ECHO) sent by a computer to check for the presence and aliveness of another.
Used to verify the presence of another system. Also the command used at a
prompt to ping a computer.
PIO (programmable input/output) Using the address bus to send communica
-
tion to a peripheral. The most common way for the CPU to communicate with
peripherals.
PIO mode A series of speed standards created by the Small Form Factor com-
mittee for the use of PIO by hard drives.The PIO modes range from PIO mode 0
to PIO mode 4.
pipeline A processing methodology where multiple calculations take place
simultaneously by being broken into a series of steps. Often used in CPUs and
video processors.
pixel (picture element) In computer graphics, the smallest element of a dis-
play space that can be independently assigned color or intensity.
platen The cylinder that guides paper through an impact printer and pro
-
vides a backing surface for the paper when images are impressed onto the page.
platform Hardware environment that supports the running of a computer
system.
plug A hardware connection with some sort of projection, which connects to
a port.
Plug and Play (PnP) A combination of smart PCs, smart devices, and smart
operating systems that automatically configure all the necessary system re
-
sources and ports when you install a new peripheral device.
POP3 (Post Office Protocol) Also called point of presence. Refers to the way
e-mail software such as Eudora gets mail from a mail server. When you obtain a
52 MIKE MEYERS’ A+ CERTIFICATION PASSPORT
Passport / Mike Meyers‘ A+ Certification Passport / Meyers / 226308-3 / Glossary
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